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Watch David Walliams undertake his mammoth panel show marathon as it happens via the Red Nose Day website on Saturday 5th March.
Which famous funny people will be helping the Little Britain and Come Fly With Me star keep his stiff upper lipper up erect during 24 Hour Panel People?
Well, for starters there's pro-funny people Jack Dee, Stephen Fry, Miranda Hart, Jason Manford, David Mitchell, Dara O鈥橞riain, Paul O鈥橤rady, Sue Perkins, Jo Brand, Jimmy Carr, Lee Mack, Charlie Brooker and Jedward will all be doing their bit to help out.
Who wouldn't want Jedward's assistance on an endurance test? Will a delirious David just think he's hallucinating them?
Shows and stars featured on the day will include:
The Generation Game - David and his mum battle it out against comedian Miranda Hart and her on screen mother, actress Patricia Hodge, with Vernon Kay as host.
Just A Minute 鈥 Radio 4鈥檚 classic show makes its on screen debut, giving fans the chance to see host Nicholas Parsons in action alongside guests including Shelia Hancock, Tony Hawks, Lee Mack and of course David Walliams.
Blankety Blank 鈥 returning to the show he hosted as alter-ego Lily Savage, Paul O鈥橤rady hosts a special edition of the celebrity game-show as himself. Guests include Barbara Windsor, David Tennant, Stacey Solomon and, yes you guessed it, David Walliams.
Through The Keyhole - the legendary Sir David Frost returns along with Loyd Grossman to take a peak into a famous home.
They Think It鈥檚 All Over - Nick Hancock, Richard Bacon and Gabby Logan are among those on the panel alongside David, who will be taking part in classic rounds such as Feel The Sportsman.
Room 101 - Nick Hancock will learn about David's pet hates as he tries to persuade him to banish them forever.
What's My Line - Hosted by Stephen K Amos with Christopher Biggins among the guests joining David.
Whose Line Is It Anyway - Clive Anderson, Tony Slattery, Neil Mullarky and Josie Lawrence are reuniting for the classic improvisation.
Never Mind The Buzzcocks - returns with Chris O'Dowd.
QI - Russell Tovey, Sue Perkins, Sean Lock and host Stephen Fry.
Would I Lie To You? - Starring David Mitchell, Lee Mack, Faye Ripley and Claudia Winkleman.
Mock The Week - David will be joined by Seann Walsh, Dara O'Briain and Andy Parsons.
Celebrity Juice - Leigh Francis will be testing David, Lauren Laverne, Professor Germaine Greer and show regulars Rufus Hound and Jedward about the week鈥檚 tabloid fodder.
It's Only TV... - Jack Dee, Danny Wallace, Ulrika Jonsson, Charlie Brooker and Tom Deacon.
Argumental - Marcus Brigstocke and Rufus Hound will be arguing and debating along with David, Jo Brand, Dara O鈥橞riain and Professor Germaine Greer.
Call My Bluff - Russell Tovey will be among those joining David as they attempt to bamboozle one another.
Mastermind - David will be among the guests taking a seat in the infamous black chair for host Griff Rhys Jones.
Have I Got News For You? - Jason Manford hosts a very special edition of the show.
The whole of 24 Hour Panel People will stream live on bbc.co.uk/rednoseday from midday on Saturday 5th March until midday on Sunday 6th March.
All proceeds raised in support of this enormous feat will go to , to help people living incredibly tough lives both here in the UK and in Africa.