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.

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.

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.

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.

"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?"