Other comedy names in the line-up are actress Miranda Hart , Rowland Rivron and Extras star Shaun Williamson.
They will all be honing their singing skills under the guidance of vocal coaches David and Carrie Grant in the show, which kicks off on BBC One this Saturday. The first celebrity is voted out later that night.
Gradually they will be whittled down until the final on Red Nose Day on Friday 16 March live from BBC Television Centre.
>Kevin Cahill, chief executive of Comic Relief, said: ‘It's a great line-up and every time somebody votes to save their favourite student, Comic Relief will get cash that goes towards helping bring an end to poverty and social injustice in the UK and Africa.’
The previous series raised more than £1 million for Comic Relief.
