Kate Middleton went in uniform for Prince George and Princess Charlotte, but made a mistake

Helen Haslem, head of High School and Prince William in Britain, holds the hands of Prince George upon his arrival at the Thomas School in Battersea, London, on September 7, 2017. REUTERS / Richard Pohle / Pool

Prince George holds the hand of his father, the British prince, when he arrives at the Thomas School in Battersea, London, on September 7, 2017. REUTERS / Richard Pohle / Pool

Britain's Prince George, accompanied by Prince William (L) of Great Britain, arrives on September 7, 2017 at the Thomas School in Battersea, South West London. / AFP PHOTO / POOL / RICHARD POHLE (Photo credit: RICHARD POHLE / AFP / Getty Images)

Prince William accompanies his son Prince George on his first day of school at Thomas School in Battersea, London on September 7, 2017. REUTERS / Richard Pohle / Pool

Helen Haslem, head of High School and Prince William in Britain, holds the hands of Prince George upon his arrival at the Thomas School in Battersea, London, on September 7, 2017. REUTERS / Richard Pohle / Pool

Prince George holds the hand of his father, the British prince, when he arrives at the Thomas School in Battersea, London, on September 7, 2017. REUTERS / Richard Pohle / Pool

The British Prince George (C) accompanied by Prince William (L) of Great Britain arrives for his first day at the Thomas School where he is greeted by Helen Haslem (R) on September 7, 2017 south west London. / AFP PHOTO / POOL / RICHARD POHLE (Credit photo to read RICHARD POHLE / AFP / Getty Images)

Prince William accompanies his son Prince George on his first day of school at Thomas School in Battersea, London on September 7, 2017. REUTERS / Richard Pohle / Pool

Prince William accompanies his son Prince George on his first day of school at Thomas School in Battersea, London on September 7, 2017. REUTERS / Richard Pohle / Pool

Helen Haslem, head of High School and Prince William in Britain, holds the hands of Prince George upon his arrival at the Thomas School in Battersea, London, on September 7, 2017. REUTERS / Richard Pohle / Pool

LONDON, ENGLAND – SEPTEMBER 7: A general view of St. Thomas School in Battersea where Prince George is attending his first day in London, UK, on ​​September 7, 2017.
(Photo by Kate Green / Anadolu Agency / Getty Images)

LONDON, ENGLAND – SEPTEMBER 7: A general view of St. Thomas School in Battersea where Prince George is attending his first day in London, UK, on ​​September 7, 2017.
(Photo by Kate Green / Anadolu Agency / Getty Images)

LONDON, ENGLAND – SEPTEMBER 7: A general view of St. Thomas School in Battersea where Prince George is attending his first day in London, UK, on ​​September 7, 2017.
(Photo by Kate Green / Anadolu Agency / Getty Images)

For the Wimbledon final, Kate recycled that Jonathan Saunders dress that she had worn during the Jubilee Royal tour in 2012.

Kate, William and Harry launched the Tour de France in July. Kate wore her green Erdem coat and her favorite L.K. Bennett Sled Pumps

The Duchess of Cambridge visits the M-PACT Plus counseling program at Saint-Sacrement school on July 1st in a GOAT coral dress with a cream clutch.

Kate is seen wearing Alexander McQueen at a military event in London.

The Duchess Kate attends the Order of the Garter in a pretty light blue coat Christopher Kane.

Prince George of Cambridge walks his hand to Catherine, the Duchess of Cambridge, watching Prince William, the Duke of Cambridge, and Prince Harry play in the Jerudong Trophy's charity polo match. Kate wears a casual striped top and skinny jeans, while George wears a cute combination.

The Duchess of Cambridge during an official visit to the National Maritime Museum on June 10, 2014 in London, England.

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge, attend a service at the commemorations of D-Day 70, June 6, 2014.

Catherine, Duchess of Cambridge, holds Prince George from Cambridge as they leave Fairbairne Airbase to return to the UK after completing their royal visit to Australia.

Catherine, Duchess of Cambridge, attends a reception hosted by Governor General Peter Cosgrove at Government House on April 24, 2014 in Canberra, Australia.

Kate attended the SportsBall with a laser-cut, black Temperley London cocktail dress paired with her Jimmy Choo heels and Alexander McQueen clutch.

Kate was lovely in London, wearing an Orla Kiely skirt and a MaxMara coat while she was getting flowers from a girl.

Kate has recycled an Orla Kiely dress and her Aquatalia boots for a charity visit with William.

Kate wore a beautiful black Temperley coat to honor Remembrance Day in London, wearing her hair in curls.

In honor of Poppy Day, William and Kate went out to London – Kate wears her long scarlet L.K. Bennett coat

Kate attended a charity gala the next day, dressed in an elegant marine dress Jenny Packham.

Kate chose Alexander McQueen for the baptism of Prince George.

Kate attended the SportsAid Athlete Workshop only months after meeting Prince George. She wore a pre-pregnancy outfit: J.Brand Skinny Jeans, Ralph Lauren Striped Top, Navy Blazer and Stuart Weitzman Wedges.

Kate and William attended a gala for the Trust Tusk, Kate glittering in Jenny Packham.

Kate joined William in Anglesey, wearing a Zara top, Paige jeans and a Ralph Lauren jacket.

Kate wore another Seraphine knot dress for the photo while William was laid back in a gingham button. And on this picture, the family dog ​​Middletons and Lupo both made the cut!

Kate and William pose with Prince George for the first official portraits of the family at his family's home.

Kate definitely made a new mom shine when she left the Lindo Wing of St. Mary's Hospital.

When Wills and Kate left to visit her parents in Bucklebury during the first weeks after George's birth, she wore a perfect Seraphine dress for new moms.

When she introduced her son to the world, Kate wore a blue polka dot dress Jenny Packham.

For her last official appearance before birth, the Duchess chose the pale pink Alexander McQueen at the 2013 Trooping the Color edition.

Kate shone by naming a cruise ship in a printed Hobbs coat.

Kate looked very beautiful at the service of the Queen's coronation in one of her favorite designers, Jenny Packham, an empire-size dress in peach lace, almost nude.

Kate was bold and brilliant at Garden Party this year, wearing a bespoke version of Emilia Wickstead's Marella coat.

Kate visited Naomi House on her wedding anniversary, wearing a fishing coat by Tara Jarmon.

Kate visited the Harry Potter sets at Warner Bros with William and Harry, dressed in a polka dot dress from Topshop.

Kate attended an event at the National Portrait Gallery, dressed in a 50s inspired Emilia Wickstead blue powder gown and gray suede pumps.

Kate visited a primary school in a pretty Erdem flower dress.

Kate attended the Queen's Scout National Review, wearing a mint blackberry coat, Whiteley Fascist and L.K. Bennett pumps. As you can see, the duchess finally jumped and her baby bump was completely visible.

Kate donned her red Armani coat, as we saw in 2006, for the visit to Scotland.

During a visit to Scotland, Kate and Wills met supporters, played ping-pong, field hockey and basketball, while wearing this tartan coat from the British brand moloh.

Kate visited the Great Tower Scout camp, keeping warm in green rain boots, a green army jacket and a crocheted hat.

Kate visits the Baker Street subway station in this teal coat Malene Birger, faithful to the royal style: a pretty black fascist.

Dressed in a pretty white coat without a redgrave goat collar over a Topshop dress, Kate visited the headquarters of Child Bereavement UK.

Kate Middleton wore this black Topshop dress while visiting the headquarters of Child Bereavement UK.

The Duchess of Cambridge attended the St. Patrick's Day parade at the Mons Barracks in the same Emilia Wickstead green coat from the previous year.

Kate attended the fourth and final day of the Cheltenham Festival in a beautiful Joseph's fishing wool coat.

Kate visited Grimsby in a beautiful brown Hobbs coat, with her baby bump beginning to appear.

Kate showed her baby bump in a MaxMara patterned dress and simple pumps during a visit to Hope House.

Kate looks in a pretty Whistles dress after seeing her first official portrait.

Kate left the hospital, after being admitted to a serious morning sickness, in a navy blue coat by Diane von Furstenberg.

Kate played hockey at Alexander McQueen during a visit to St. Andrews University.

Kate wore this MaxMara Studio coat over a leopard print dress for her first visit to Cambridge.

Kate was shining in an emerald blackberry robe for an opening at the Natural History Museum.

Kate dons her Temperley London lace dress, this time adding a touch of red with her Alexander McQueen clutch.

Kate attended a Royal Reception for Olympic and Paralympic athletes from the British team, wearing a black floral dress and transparent sleeves.

Kate leans to receive flowers from an adorable two year old child. She is lovely in Alexander McQueen.

Back in the UK, Kate and Wills attend the official launch of the new football center, the Duchess wearing a Reiss coat.

During their visit, Kate wore this navy blue carnation dress with traditional ornaments, with natural hair.

Kate was ready to dance with the traditional dancers, in a grass skirt much cooler than the one we've ever seen.

The royal couple got on a plane, Kate dressed in a pale yellow carnation dress and Stuart Weitzman wedges.

The Duke and Duchess were smiling in the traditional clothing of the island when they visited the Governor General's house.

This yellow Jaeger shirt was light, shiny and cool for the hot weather of the islands.

On the 6th day, Kate and Wills arrived in Solomon Islands, Kate dressed in a brilliant Jonathan Saunders dress.

The casual duo crosses a bridge in a Rainforest research center in Malaysia.

Kate wore this sparkling Alexander McQueen at a dinner with the Malaysian Head of State.

Kate wore a pale teal dress to visit the Singapore Memorial Cemetery, looking pensively as she walked beside her husband.

While in Malaysia, Kate wore a Temperley London ice-blue lace dress, her hair rolled up in a pretty bun.

On the fourth day, Kate and William visited a mosque, respectfully removing their shoes, Kate was wearing a scarf and was beautiful in white.

Kate looked gorgeous in a Erdem floral dress at the reception of the British Gala.

She also wore a pretty Alexander McQueen skirt and jacket with Stuart Weitzman wedges.

On day 2, Kate wore this pure Raoul dress and her nude pumps.

Kate looked classy and professional at the Paralympic Day medal ceremony.

Kate attends the 10th day of the Olympic Games in a zipped windbreaker for the sailing events.

Wills and Kate celebrate a big win for the United Kingdom during the Olympics.

The Olympics have stormed London and young members of the Royal Family are not going to miss. Kate sported the British colors in this striped top and navy blue jeans.

Kate and William visited Bacon College with Prince Harry, Kate wearing a gray and white plaid dress.

Our three favorite royal family members are waiting to receive the Olympic Flame at Buckingham Palace on its way to Britain up to the Olympic Stadium.

Kate looked dynamic in Stella McCartney during her visit to the National Portrait Gallery.

Kate looked classy in white at Wimbledon, wearing a fun animal print pouch.

Kate paid tribute to Scotland with her embrace as she watched Prince William installed as Knight of the Thistle in Edinburgh.

It was time for the Order of the Garter, and while most members of the royal family were in pale hues, Kate's Alexander McQueen stole the show.

Kate wore boots at a polo match, with casual jeans and her dog Lupo by her side.

Kate made a car sign at the Trooping the Color ceremony, wearing one of her favorite designers, Erdem.

The Diamond Jubliee continues, and Kate is seen in a nude Alexander McQueen lace dress with a Jane Taylor fascist.

Kate wore a bright red robe Alexander McQueen, wearing a pocket of the same designer and wearing his favorite L.K. Bennett heels at the Diamond Jubilee celebrations.

Kate is pretty pink at the Queen's Garden Party at Buckingham Palace, dressed in an Emilia Wickstead dress and classic heels.

Ok, so maybe this photo is more about the puppy-love than the dress, but the Duchess still looks classy, ​​even playing with her and the puppy Wills, Lupo!

While attending an Olympic concert, Kate dominated the red carpet in a Jenny Packham lace-back dress.

Kate shows a small leg in this elegant Roland Mouret dress.

In one of our favorite looks, Kate had the embellishment of her Matthew Williamson dress for her – and she was gorgeous.

The duchess is a hard worker! Helping to plant a tree, Kate always looked totally glamorous in a vibrant Reiss blue dress.

It was St. Patrick's Day and Kate was gorgeous in green, a belted dress of Emilia Wickstead.

Kate was cute and casual in skinny coral jeans playing hockey with the Olympic team.

Kate wore an Orla Kiely dress for a visit to South London.

Kate wore this peplum skirt costume by L.K. Bennett and a James Lock during a visit to Leicester, England.

Kate wore this Missoni coat in slightly distressed tweed on tea with the queen and Camilla.

Kate visited Oxford schools, wearing an Orla Kiely dress with bird print.

Kate wore this brown Hobbs coat to visit Liverpool, pairing it with black stockings and pumps.

Kate visited the National Portrait Gallery in a wide-necked belted gray jacket.

At the War Horse premiere in the UK, Kate wore a Temperley London lace dress.

The royal family attended a Christmas service, all in chic jackets and boots when they arrived.

Just before the holidays, the Duke and Duchess visited a homeless charity, Kate, in a simple Ralph Lauren turtleneck dress.

Prince William, Kate and Prince Harry arrive at the Imperial War Museum, all dressed in black ties.

Kate chatted with guests at a reception at St. James Palace, dressed in a silver one-shoulder dress.

A beautiful duo: Kate was wearing this crimson Beulah London dress, adding vitality to Fall in London.

Kate looked adorable to Amanda Wakeley while she and William were visiting the Royal Marsden Hospital.

The Duke and Duchess visited Birmingham, Kate wearing Alexander McQueen.

Kate shined in this classic draped dress from Roksanda Ilincic.

Kate and Wills are back in the UK, the duchess dressed in a beige v-neck dress for the opening of the halls at Buckingham Palace.

Kate in Santa Barbara, in a floral dress Jenny Packham.

Kate and Wills attended the BAFTA Awards, Kate showed a tiny waist in this Sarah Burton long dress for Alexander McQueen.

Kate has worn this gray color change by London designer Roksanda Ilincic in Los Angeles.

The Duke and Duchess arrived in Los Angeles, Kate in a bright green dress by one of our favorite designers, Diane von Furstenberg.

Kate looked adorable in that canary yellow dress Jenny Packham, but she battled the wind at the Calgary International Airport.

The Duke and Duchess boarded a Canadian Air Force aircraft, Kate is wearing skinny jeans and L.K. Bennett's Creeping Corners.

Kate looked cool and casual with boat shoes and jeans.

Kate and Wills smile at each other, the Duchess dressed Sarah Burton for Alexander McQueen on their 5th day in Canada.

The newyweds are cute and relaxed, in a rare embrace (public at least!) After participating in a dragon boat race.

Kate wore this simple change of color during her visit to Canada, wearing her favorite L.K. Bennett "Natalie" clutch.

On the fourth day of their visit to Canada, Kate was seen in a bright blue Erdem dress with lace details on the bodice.

Kate was wearing this gray town dress in Canada, with a pointed collar and cuffed sleeves.

Kate was a tanned beauty in this Issa dress with long sleeves and purple during the Royal Couple's Canadian tour.

Kate looks over her shoulder as she and Wills attend the Canada Day celebrations in Ottowa. She was wearing a white Reiss dress with bold red accents in her fascist and heels.

Kate wore a straight Erdem lace dress and a L.K. nude dress. Bennett treads the wreath laying ceremony at the National War Memorial in Canada.

Kate wore this bold military style Alexander McQueen coat during a visit to the army barracks in Windsor.

Kate and Camilla, Duchess of Cornwall, wear pretty coats to the Order of the Garter Service.

Kate wore her blue brocade coat of blueberry Jane Troughton at the service of the church celebrating the 90th birthday of Prince Philip.

Kate and William were the image of elegance at the 2011 ceremony of the color parade for the Queen's birthday.

Kate and her sister Pippa attend the wedding of a friend, both dressed in black and white patterned dresses and matching court shoes.

Kate attended the Tenth Annual ARK Gala Dinner in a beautiful Jenny Packham dress.

Kate attended Derby Day, everyone was dressed to nine. The duchess was in a white Reiss dress and a beige fascinator.

The Duchess met Michelle Obama at Buckingham Palace, wearing a neutral, short-sleeved Reiss dress.

Kate and William went on a honeymoon the day after their wedding, Kate dressed in a simple belted blue dress and her L.K. Bennett corners.

Kate leaves Clarence House to attend the evening following her wedding with Prince William, in a pretty satin dress with an ornate belt that shows her size.

The new Duke and Duchess of Cambridge hug on the balcony of Buckingham Palace to cheer the crowd.

The blushing bride comes out of Westminster Abbey, dizzying in her Sarah Burton dress for Alexander McQueen.

Here is the near-bride … Kate smiles for the camera as she arrives at the Goring Hotel with her mother and sister on the eve of her wedding. She looked beautiful in a patterned Issa dress and L.K. Bennett corners.

Kate wore a flared neutral trench coat while visiting Northern Ireland.

The dashing couple was wearing a navy blue suit during a visit to a track and field track in Darwen, England.

Kate and William visit their Alma Mater, St. Andrews University, for its 600th anniversary celebrations.

Kate had all the nuances to launch a new RNLI lifeboat in the cold of February.

The couple attended a Christmas "Spectacular", dressed in contrasts of black and white with a bold collar.

The couple were charming and happy as we can be!

For official engagement photos of Kate and William, she chose a white Reiss dress.

A royal commitment! Kate's Issa navy dress of her engagement photo is one of the most sought after dresses she's wearing.

Kate and Wills attend the wedding of a friend. Kate is wearing a shiny silk dress with a black jacket and accessories.

Kate chose a summer dress and a teal leather bag belted for the Polo Cup Chakravarty Match.

Kate was wearing a beautiful blue patterned Jane Troughton coat for a friend 's wedding, with a Jane Corbett fasciator and black pumps.

Kate was wearing skinny jeans and a leather jacket at a charity match played by Prince William and Harry.

Kate attended the Midnight Roller Day-Glo nightclub in London, supporting an Oxford charity.

Kate channeled the 60s in this mod-inspired dress in London.

Kate was beautiful at the wedding of Lady Rose Windsor, dressed in a splash of color and printed with black accessories.

Kate wore a pretty white Issa dress with a vest at the Wimbledon Tennis Championships.

Still there to support, Kate watched Wills and Harry play in a charity match.

Kate attended the service of the noblest order of the garter, standing with Camilla, the Duchess of Cornwall in black and white contrast.

Kate in her casual look: jeans and a jacket.

Kate with Prince William after graduation, now a pilot of the Royal Air Force, wearing a nice peacoat.

We love Kate's navy-lined navy blue – a look fashion folks know is very chic, but many would be scared to do it.

Kate attended an evening after the opening night of Afrika Afrika, dressed in an animal print dress.

Kate attended another book launch, dressed in a simple short-sleeved dress.

Dressed in a vest over the long sleeves, Kate and the rowing team train for the Charity Challenge.

Sport-chic Kate participated in a workout with the rowing team of Sisterhood Cross Channel.

In search of nautical colors and corners, Kate has been spotted in London.

Kate attended the concert for Diana in London, wearing a white trench and black-heeled boots.

Kate smiles in a casual top and jeans in London.

The Middleton sisters were delightful at a book launch party in London.

Kate wore a sweater and a pencil skirt with boots at the Badminton Horse events, mastering this transition period when the spring has cold air.

Kate wore a 60's inspired dress in London.

Kate and Pippa watched William play rugby in jeans and boots.

For the day after the festival, Kate opted for a mix of blues and browns, packing her with a pretty scarf and a beret.

Back to her classic, almost professional, Kate wore a skirt and dark green coat matching the Cheltenham Festival.

Seen out of the room, Kate looked classic in a shimmering black jacket.

In showing off a skin not often seen, the Duchess now was on the town with friends.

Kate was wearing this black and white casual dress, coming from work.

Kate wore a red Armani coat during the Sovereign's parade at the Royal Military Academy.

Kate wore white jeans and a simple vest at the Beaufort Polo Club.

Dressed in casual summer whites, Kate attended the Rundle Cup day with Chelsy Davy (formerly Prince Harry's girlfriend) and William's cousin, Zara Phillips.

Kate wore one of her favorite silhouettes, a simple wrap dress, for a polo match.

Kate dances with a friend at a pre-Wimbledon party, dressed in a dark flowered dress.

Kate wore red and white polka dots to match the Chakravarty Polo, completing the look with classic strappy shoes and sunglasses.

Kate wore a floral dress and a pink jacket in a store opening, letting her bangs fall.

Kate attended the Boodles boxing ball, dressed in bright blue to support the Sparks sports charity.

Kate looked lovely in a long cream coat and her fascinator at a friend 's wedding.

Wills made Kate laugh after she and her sister saw her playing in a field match at Eton College.

Kate wore flat boots, a long coat and a Russian-style fur hat at the Cheltenham Festival with her sister Pippa.

Kate and her mother, Carole Middleton, attended the Spirit of Christmas shopping festival in London, Kate in blue jeans and blazer.

A relaxed Kate with her father, the graduation weekend.

Kate, dressed in a casual sweater with a brown jacket, wore her hair for the Gatcombe horse trials.

Kate Middleton and Prince William, the day of the graduation ceremony at St. Andrews University.

Kate graduated from St. Andrews, where she met Prince William.

Kate attends the wedding of a friend, dressed in a black and white lace patterned skirt with a free jacket and a fascinator.

Kate skis at the Klosters with William and his family.

Kate with her sister Pippa and father Michael in Jerash, Jordan. The Middleton family moved to Amman, Jordan, for two and a half years.

An adorable Kate smiles at the camera, five years old.

Kate, 3, wears bright stripes.