Michelle Keegan, Caroline Flack and Russell Brand will compete in The Great Celebrity Bake Off.
The trio will join stars including John Lithgow, Jeremy Paxman, Sally Lindsay, Jon Richardson, Russell Tovey, Greg Wise, Jess Phillips MP, James Acaster, Big Narstie, Nicola Adams, Katarina Johnson-Thompson, Hannah Cockroft, Joe Wilkinson, Johnny Vegas, Georgia Toffolo, Krishnan Guru-Murthy and Rylan Clark-Neal for the Stand Up To Cancer special of the baking show next year on Channel 4.
Sarah Lazenby, Channel 4 Head of Formats and Features said: "Stand Up To Cancer has become a force to be reckoned with in the fight against cancer.
"As part of the fundraising campaign this year's special celebrity editions of 'Bake Off' managed to raise millions of pounds to fund ground breaking cancer trials.
"We hope to do the same again next year with our brilliant line up of famous bakers – all of whom bring their unique skills to the infamous tent.
Expect some great bakes, a dollop of disasters, and lots and lots of laughs.
"Expect some great bakes, a dollop of disasters, and lots and lots of laughs."
Kieran Smith Bake Off Executive Producer added: “All of us have been affected by cancer in some way or other and Love are proud to once again partner with Stand Up To Cancer.
"We hope the prospect of 20 famous bakers sweating it out in our famous white tent proves hugely entertaining.
"But most importantly helps raise vital funds for a very worthwhile cause."
The five part series will air in 2019 and will feature judges Paul Hollywood and Prue Leith, plus hosts Sandi Toksvig and Noel Fielding.
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