Sir Terry Wogan is returning to his chat show roots for Comic Relief.
The BBC Radio 2 presenter - who last fronted such a programme seven years ago - will join Graham Norton for a co-hosting stint as part of his bid to set a record for chat show presenting.
'Comic Relief's Big Chat with Graham Norton' will see the presenter attempt to set the Guinness World Record for 'Most Questions Asked on a TV Chat Show' from 7pm on Thursday, March 7 until the early hours of the following day on BBC Three, with Terry, 74, and Nick Grimshaw on hand to ask back-up questions.
Graham jokingly claimed his show is a match for previous Comic Relief and Sport Relief challenges, which included David Walliams swimming the River Thames, Eddie Izzard completing 43 marathons in 51 days, and John Bishop, who endured a "week of Hell" which saw him complete a 230-mile triathlon from London to Paris in five days.
Speaking about the challenge, Graham said: "David Walliams swam the Thames, John Bishop endured a week of hell and Eddie Izzard ran marathon after marathon after marathon.
"I am hoping to join the elite group of marathon celebrity fundraisers by doing what I do best - sitting on my backside and talking."
Guests who will appear on the talk show include Ronnie Corbett, Sarah Millican, Martin Freeman, Jimmy Carr, Lee Mack, Keith Lemon, Elle Macpherson, James Nesbitt, Paddy McGuinness, Heston Blumenthal and Kirstie Allsopp.
There will also be music from Example, Paloma Faith, Hurts and Laura Mvula.