Kylie and Dannii are Teaming Up for X Factor Australia

THIS year's X Factor Australia has scored a major pop culture coup - reuniting Dannii and Kylie Minogue on screen.

It is the first time the musical sisters have worked together on Australian TV since a Young Talent Time concert in 1987.

"I don't even want to think of how long ago that was," Kylie said. "My hair was bigger, my waist was smaller ... good times."

Dannii, one of the judges on this year's X Factor, recruited sister Kylie to mentor her contestants on the reality TV hit.

The sisterly episode was filmed in New York last June, where Kylie is working on her new album.

It is Dannii's first time as a judge on the Australian X Factor, after finding success on the British show.

While the pair are no strangers to passing comment on singers on reality TV shows, until now it's been at home in private.

"Usually we're in pyjamas and ugg boots," Dannii said. "So this is a change. Kylie is a huge X Factor fan."

Older sister Kylie was Dannii's first choice as mentor, a role she performed on the UK X Factor four years ago.

"Dannii is so good at this, I'm just along for the ride," Kylie said. "It's really fun to do something together, so it was a done deal when she asked me.

"This feels normal for us. This kind of show is one of Dannii's natural habitats, but I do feel at home on a TV set and being with my sister. If you've grown up being a tennis player you're comfortable on a tennis court, we're both comfortable in this environment."

Kylie said she is unsure whether she would audition for The X Factor if she was starting out in the industry.

"I have questioned that myself. I don't know. I'm sure I wouldn't make it through. I really am. Luckily, now I've had some experience so I've got a few more tools in my kit."