David Cameron is to make a "cameo" appearance in a Comic Relief music video with teen heartthrobs One Direction.
The Prime Minister features in the group's official Red Nose Day single, which is a cover version medley of Blondie's One Way Or Another and the Undertones' Teenage Kicks.
The Government has already agreed to cover the cost of VAT on sales of the record to help the fund-raising effort.
One Direction, who have stormed to global fame after being put together on X Factor, went to Downing Street to film the clip last year.
It is not the first time Mr Cameron has taken part in Comic Relief, which has raised £800m since it was first launched 25 years ago.
In 2011, he recorded a special episode of MasterChef in the kitchens at Number 10 with comediennes Miranda Hart and Ruby Wax.
His predecessors Gordon Brown and Tony Blair have both also taken part in sketches for the charity.
In 2011, after he had left office, Mr Brown teamed up with James Corden, JLS and other celebrities in a comedy sketch.
And in 2007, Mr Blair showed off his acting skills in a segment with comedy actress Catherine Tate.
He had to deal with one of her most popular characters - stroppy teenager Lauren Cooper - and delivered her famous catchphrase: "Am I bovvered?"
Red Nose Day is on March 15.