Here is what you need to know about the 20 celebrities taking part in this year's The Great Celebrity Bake Off for Stand Up To Cancer.
– James McAvoy
The Golden Globe-nominated actor played a young Charles Xavier in the X-Men film series and most recently appeared as Lord Asriel in the BBC adaptation of His Dark Materials.
– Daisy Ridley
Best known for starring as Rey in the Star Wars sequel trilogy, Ridley is set to appear in upcoming science fiction thriller Chaos Walking alongside Tom Holland.
– Dame Kelly Holmes
The retired middle distance athlete specialised in the 800 metres and 1500 metres events and won gold for both at the 2004 Olympics in Athens.
– John Bishop
Liverpool-born comedian and actor Bishop was recently cast as a companion in Doctor Who.
– Stacey Dooley
After making a name for herself fronting investigative documentaries for the BBC, Dooley won Strictly Come Dancing alongside professional dance partner and now-boyfriend Kevin Clifton.
– Tom Allen
The comedian will make his debut as a competitor in the tent after hosting Bake Off: The Professionals and featuring regularly on the spin-off Extra Slice.
– David Baddiel
Best known for his comedy partnership with Frank Skinner and for writing the football anthem Three Lions, Baddiel is also a published author and has been outspoken on the issue of anti-Semitism.
– Jade Thirlwall
The Little Mix star found fame on The X Factor in 2011 and her girl band have become one of the country's biggest-selling.
YouTube and rapper KSI, whose real name is Olajide William "JJ" Olatunji, has more than 22 million subscribers on the video platform and last year released his debut album.
– Ade Adepitan
Having survived polio as a child, Adepitan went on to compete as a wheelchair basketball player at international level before moving into presenting.
– Philippa Perry
The renowned psychotherapist is known for her books, which include How To Stay Sane, and her documentaries for the BBC and Channel 4.
– Nick Grimshaw
Known as Grimmy, the television and radio presenter has hosted a range of shows on BBC Radio 1.
– Rob Beckett
Best known for his comedy partnership with Romesh Ranganathan, Beckett's credits include panel show 8 Out Of 10 Cats and narrating the reality series Celebs Go Dating.
– Alexandra Burke
Burke won the fifth series of The X Factor in 2008 and has since released hits including Hallelujah and Broken Heels.
– Anneka Rice
Rice became a household name nearly 40 years ago on Channel 4's game show Treasure Hunt. She launched her own series, Challenge Anneka, in 1989.
– Reece Shearsmith
The actor and writer was one of the brains behind cult sketch show The League Of Gentlemen and also co-created comedy series Psychoville.
– Dizzee Rascal
Considered one of the pioneers of the grime music genre, the east London rapper released his debut album Boy In Da Corner in 2003.
Pop star Anne-Marie, from Essex, has worked with artists including Clean Bandit and Sean Paul.
– Nadine Coyle
As part of Girls Aloud, the Irish singer scored four number one singles and two number one albums.
– Katherine Ryan
The Canadian comedian and actress is a regular face on shows including Mock The Week and Have I Got News For You and recently starred in her own Netflix series, The Duchess.