Brittany Hockley - The Bachelor
"Promise I don’t mention the word 'journey' or 'for the right reasons' once," Brittany joked of the show on Instagram, in a cheeky reference to her Bachelor beginnings.
Brooke Blurton - The Bachelorette
"Little B is ready!!! This little pocket rocket is locked and loaded baby!" Brooke wrote as she announced she'd be joining the show on Instagram.
Suzan Mutesi - Influencer
"She said Yasss! 💍hallenge accepted Australia! I am honoured to be part of the very first @thechallenge_au," Suzan wrote on Instagram.
Brooke Jowett - Survivor
After announcing she'd been cast, Brooke took to Instagram to pen: "Challenge Accepted."
Cyrell Paule - Married At First Sight
Cyclone Cyrell is back and we can't wait to see what drama she kicks up on the show.
Jessica Brody - The Bachelor
It's been a while since Jess hit our TV screens and we can't wait to see what she has in store for us now.
Emily Seebohm - Olympic swimmer
Emily is guaranteed to ace the physical challenges on the show, so long as they involve water!
Audrey Kanongara - Love Island
Audrey's not looking for love as she returns to TV screens across Australia!
Sugar Neekz Johnson - Pro boxer
Sugar may not be a reality TV star, but it looks like she'll be a fierce contender on The Challenge.
David Subritzki - I'm A Celebrity... Get Me Out Of Here
After winning Aussies over on I'm A Celeb..., it was only a matter of time before David was back on our screens.
Konrad Bien-Stephen - The Bachelorette
Rumours of Konrad's supposed fling with co-star Meghan emerged just as news broke of his split from Abbie Chatfield. We wonder if any of the drama was caught on cameras for the show...
Ciarran Stott - The Bachelorette
He's looking a little different these days, but we're eager to see if Ciarran is a changed man as he returns to TV on a whole new show.
Johnny Eastoe - Survivor
If he can manage Survivor, we're sure Johnny will find The Challenge a walk in the park. Or will he?
Conor Curran - MasterChef
He's the only MasterChef star joining the show, so Conor already stands out from the pack. We'll see if that works to his advantage or not.
Marley Biyendolo - Big Brother
Big Brother winner Marley may be looking to add another reality TV prize to his trophy shelf!
Ryan Gallagher - Married At First Sight
Ryan's back and we already know he'll be involved in some sort of drama on the show. We can just feel it.
Grant Crapp - Love Island
We're certainly not sad to see this handsome man returning to our TV screens.
Billy Dib - Pro boxer
Billy is guaranteed to be a major contender in physical challenges on the show.
Jack Vidgen - Singer
He's done The Voice, The Masked Singer, I'm A Celeb and Ninja Warrior - now Jack's adding The Challenge to his resume.
Troy Cullen - Ninja Warrior
Another fit contestant, Troy may just be the biggest physical competitor this season.
The Challenge Australia is coming soon to Channel 10 and 10play