Maddie and Mackenzie Ziegler may be young in age, but they are already old-hands at the show-biz game and know what it’s like to stand in front of crowd of thousands who are all just waiting to catch a glimpse of them.

The dancing sister duo first found fame on the reality TV showDance Momsback in 2011 and since exiting the popular series in 2016 they have both gone on to star in movies, music videos and both write books.

The sisters are set to return to Australia next week to hold a series of events with fans across the country that include a dance masterclass, a Q&A, and a meet and greet.

But despite their professional experience, Maddie and Mackenzie say there’s only one question that fans and media ask them over and over again when they are touring together.

Along with her TV fame, Maddie has also starred in the filmThe Book of Henrywhileher 2017 memoir,The Maddie Diaries,was aNew York TimesBest Seller.

However, you’re probably more likely to recognise her for her bold dance moves thanks to her starring roles in six of Sia’s music videos includingChandelierandElastic Heart.

In fact, it was her first musical collaboration with Sia that shot her to a level of fame she had never anticipated.

“I have now filmed a movie with Sia and i

Maddie and Mackenzie Ziegler. Source: Supplied.

Mackenzie also knows what it is like to amass a legion of fans at a very young age, with huge groups of people turning out to her recent meet-and-greets for her new book,Kenzie’s Rules for Life.

It's a very good thing that they are over that fear now because next week as they make their way across Australia, they will be greeted by hoards of girls and boys (and even some adults) who will be completely starstruck by them.

But for Maddie and Mackenzie, who have a collective social media fan base of over 25 million, there is only one celebrity who has truly floored them both.

While some sessions for their Australian tour have already sold out, Maddie and Mackenzie hope that the Aussie fans who are coming along to see them while be inspired to follow their own dreams.

For Maddie and Mackenzie 2018 tourtickets and information you can visit Maddie and Mackenzie Ziegler's website.