Prime Minister David Cameron joined One Direction in the music video for the band's official Red Nose Day song.
The Prime Minister made a cameo in the boy band's new video for their Comic Relief charity single One Way Or Another (Teenage Kicks), which was filmed outside 10 Downing Street.
David later tweeted his delight at the guest appearance: "Enjoyed my cameo in @onedirection's vid for @comicrelief charity single. Glad to help with the filming location!#1DRND."
To save money for Comic Relief, the band - Niall Horan, Zayn Malik, Liam Payne, Harry Styles and Louis Tomlinson - decided to film the video themselves during trips around the world while on tour.
It includes scenes filmed on the road in New York, Japan and London as well as Africa, when they visited projects supported by money raised through Red Nose Day earlier this year.
The boys visited Accra in Ghana and described the two-day trip as a "real eye-opener."
One Direction - who will not receive any payment from the single - will perform the track, a mash-up of Blondie and The Undertones' 1978 hits, at the Brit Awards for the first time on February 20.
The song is now available to download and buy, in time for Red Nose Day on March 15.