She's joined by her sister Hayley as the pair vie to secure a $100,000 donation to their chosen charity.

"We are so excited to join The Amazing Race Australia: Celebrity Edition," Ms Watkins said in a post to Facebook.

"We've always dreamed of being able to do The Amazing Race together!"

The team joins a star-studded lineup including the former Silverchair drummer and his wife Ben and Jackie Gillies. If they win the Gillies will donate the prize pool to Moira Kelly Creating Hope Foundation.

Ex-athlete Jana Pittman and her eldest son Cornelius will also join the race and they'll give the money to the Royal Hospital for Women.

IN OTHER NEWS:

TV host Grant Denyer and wife Chezzie have signed on and their chosen charity is Lifeline.

AFL WAG Bec Judd and her sister Kate Twigley pledge their prize money to Impatient Advocacy - A Nicole Cooper Foundation.

Too Hot to Handle favourite Harry Jowsey and his friend Teddy Briggs are raising fund for Beyond Blue.

Comedian Dane Simpson and his father Bow and the pair will donate to Darugal Elders in Wolgan.

Another classic Australian comedian Peter Rowsthorn has signed on with his daughter Frankie.

As has singer Alli Simpson with her mother Angie, presenter Darren McMullen and nephew Tristan and Australian Survivor contestant George Mladenov and his sister Pamela.