Rebecca Adlington, former Westlife star Kian Egan and 'EastEnders' actress Laila Morse are among the contestants taking part in this year's 'I'm a Celebrity... Get Me Out of Here!'
The line-up also includes 'The Fresh Prince of Bel-Air' star Alfonso Ribeiro, snooker ace Steve Davis, reality TV star Joey Essex and 'Emmerdale' actress Lucy Pargeter.
ITV confirmed on Wednesday that fashion designer David Emanuel, best known for creating the wedding dress worn by Diana, Princess of Wales in 1981, Miss Great Britain Amy Willerton and presenter Matthew Wright will also get stuck into the infamous Bushtucker Trials and battle it out in the Australian outback for the reality series.
Speaking about her decision to take part in the annual show, Rebecca, who won two gold medals at the 2008 Beijing Olympics, said: "It's a once in a lifetime opportunity. It's a chance for me to do something completely different in my life."
The 24-year-old retired swimmer added: "I am also looking forward to being part of a team again. Since I retired, I have missed that team environment and so I am really looking forward to feeling like a big family, enjoying working together and being part of all the banter."
Former 'The Only Way Is Essex' star Joey hopes the move will help further his career in TV.
The 23-year-old personality said: "Five years ago, I started watching the show and now I really can't believe I am going to be going in the jungle. I am so happy. I can't say this enough. What an incredible opportunity."
The series, hosted by Ant & Dec, will return to ITV this Sunday, November 17 at 9pm.
Irish presenter Laura Whitmore, Joe Swash and Rob Beckett will also host 'I'm a Celebrity...Get Me Out Of Here Now!' every evening on ITV2.