British stars are lining up to speak to gay comic Graham Norton for his upcoming charity chat show marathon.

Comic Relief’s Big Chat with Graham Norton will see the presenter attempt to break the Guinness World Record for ‘Most Questions Asked on a TV Chat Show’.

Strictly Come Dancing winner and Olympian Louis Smith and gay actor Russell Tovey are among the long list of celebrities.

Norton 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 this elite group of celebrity fundraisers by doing what I do best – sitting on my backside and talking.’

Other celebrities appearing include Sarah Millican, Lee Mack, Ronnie Corbett, Aston Merrygold from JLS, and Lee Mack.

Warwick Davis, Alex Jones, Steve Jones, Kirstie Alsopp, Ashley Banjo, Kimberley Wyatt, Heston Blumenthal and Elle Macpherson complete the lineup.

Pop stars Example, Paloma Faith, Hurts and Laura Mvula will provide the music during the night.

Viewers will be able to submit questions for Norton to ask guests via BBC Three’s Twitter and Facebook page.

The night will air from 7pm on 7 March on BBC Three.