David Walliams has teamed up with four other celebrities to create a spoof Take That for Comic Relief.
The British comedian - alongside Alan Carr, Catherine Tate, John Bishop and James Corden - will audition as tribute group Fake That in a charity sketch, which will see them go to extreme lengths in a bid to impress the man-band, with the use of props, numerous costume changes and complicated choreography.
David - who will portray Howard Donald - said: "Being in a boy band for the day was really tiring. We had to do all the dance moves - but when Take That did it they were like, 22 - I'm 39, and I just thought 'I can't handle this'!"
John (Robbie Williams) added: "It was great being in a boyband - except one of us was a girl and none of the rest of us are boys. Obviously it's a good cause, but aside from the charity it was just a great day, I'd have paid to do it."
The sketch will also see James become Gary Barlow, Alan morph into Mark Owen and Catherine star as Jason Orange.
John added: "Someone thinks I'm Robbie and I understand why. Bit of a maverick, dancer, singer, mover. James Corden thinks he's Gary Barlow. He's more Ken Barlow, to be honest."
However, Gary was impressed with James' effort, saying: "We look nothing alike but he's doing a good job of pretending to be me."