Socialite Tara Palmer-Tomkinson, DJ Colin Murray and Birds of a Feather actress Linda Robson will lead this year's Celebrity Fame Academy line-up.
Patrick Kielty will host the show with Claudia Winkleman
BBC Sport presenter Ray Stubbs and TV comic Mel Giedroyc are also among the 13 personalities lined up to star.
Ricky Gervais will make an appearance - but only to support contestant Shaun Williamson, his co-star in Extras.
Presented in aid of Comic Relief, the programme will launch this weekend and runs until Red Nose Day on 16 March.
Other familiar faces hoping to be crowned this year's champion include Heartbeat star Tricia Penrose, presenter Angellica Bell and Blue Peter's Zoe Salmon.
Comedians Rowland Rivron, Fred MacAulay, Miranda Hart and Tim Vine complete the line-up.
Regular presenter Patrick Kielty will share hosting duties with Claudia Winkleman.
DJ Edith Bowman won the 2005 edition of the show, which raised more than £1.3m for charity. Actor Will Mellor won the first celebrity contest in 2003.