Viewers will see double on Friday.
Five of Britain's favourite comedians are mimicking Take That in a tribute for Red Nose Day.
The spoof band will consist of David Walliams, Catherine Tate, Alan Carr, James Corden and John Bishop and each comedian will be imitating a band member.
Another highlight will include a Susan Boyle duet with Peter Kay.
And spoof period drama Upstairs Downton Abbey will star Joanna Lumley, Kim Cattrall and Jennifer Saunders.
More than 10 million viewers are expected watch the charity marathon, which starts at 7pm on BBC1.
Photo: © Comic Relief