Dannii Minogue wishes Kylie Minogue a happy 51st birthday and shares a nice photo of regression

Dannii Minogue paid a warm tribute to her older sister Kylie Minogue in honor of her 51st birthday on Tuesday.

The former 47-year-old X Factor judge shared a reminder photo of herself and her sister since their childhood.

'Happy birthday to my big sister. Now for a new year of fun and festivities. Love of Sister Disco xx, "Dannii subtitled the pretty picture.

Skater Girls: 47-year-old Dannii Minogue (left) dedicates her birthday to her big sister Kylie Minogue (right) on the occasion of her 51st birthday while sharing a snapshot of their childhood on Tuesday

Kylie answered, sharing a series of emoticons of love to the heart and writing: "Always !!!"

They seem to sit on a walk in the back of a house, both girls wearing roller skates.

The picture seems to have been taken in the late 1970s. Kylie and Dannii wore clothes from that decade.

So cute! 'Happy birthday to my big sister. Now for a new year of fun and festivities. Love from Sister Disco xx, wrote Dannii on Instagram. Photo set at a Christmas concert in London in December 2015

Best friends: The sisters have always had close relationships. Photo taken together at the Music Industry Trust Awards in London in October 2007

Dannii was dressed in khaki pants and a button-down shirt with matching floral print.

Her brown, medium length hair was worn straight and relaxed and was hidden behind an ear.

Meanwhile, we see Kylie dressed in blue jeans and a black sweater, her mop of wavy light brown hair concealing much of her face.

Inspiration: Dannii revealed that she had always sought advice from Kylie during an interview for 2017 with 9Honey. Photographed together at the ELLE Style Awards in London in February 2005

In the photo, we see Dannii holding what seems to be a kitten while radiating towards the camera.

We see her older sister looking at the toy on her lap, with what appears to be a Frisbee sitting on her own lap.

The sisters have always had close relationships. Dannii revealed that she had always turned to Kylie for advice during an interview with 9Honey in 2017.

Hero status: "My sister has always been amazing," Dannii told 9Honey in 2017. Photographed together at the ELLE Style Awards in London in February 2010

"My sister has always been amazing," Dannii told the publication at the time.

& # 39;[She’s] always a tour de force, and very classy with the way she handles everything.

"My sister is my favorite advice. And always when I look at her, she is physically a very small thing, and you say to yourself, "Where does all this force come from?"

& # 39;[She’s] always a tour de force, and very chic with the way it handles everything, "said Kylie's Dannii. On the picture together at a musical in London in August 2015