Comic Relief's mini-series version of the reality show, which will be hosted by Mel Giedroyc, is scheduled to air on January 21-24.
[Comic Relief Bake Off - Heat One]
Jo Brand, Stephen K Amos and double act Lorna Watson and Ingrid Oliver will take part in the show's first heat.
[Comic Relief Bake Off - Heat Two]
Heat two will feature Warwick Davis, Dragons' Den star Duncan Bannatyne and TV presenters Andy Akinwolere and Simon Reeve.
[Comic Relief Bake Off - Heat Three]
The third show will feature Paralympic gold medal winner Ellie Simmonds, TV presenters Julia Bradbury and Kirsty Wark and comedian Bob Mortimer.
[Comic Relief Bake Off - Heat Four]
Completing the lineup in the final show are Strictly presenter Claudia Winkleman, stand-up Ed Byrne, Olympian Helen Glover and journalist Martha Kearney.
Paul Hollywood and Mary Berry will be back to judge the celebs' baking skills and technique as they take on Signature Bakes, Technical Bakes and Showstopper Bakes.
Watch the BBC Two trailer for the celeb Bake Off: