Taylor Swift and Ed Sheeran were joined by Cara Delevingne as they jammed away the night in the US Ambassador's house in London.

The '22' star is currently in the English city as she brings her Red Tour to the UK for the first time and it seems she has been visiting the US Embassy.

She posted a video of herself along with Sheeran and Delevingne as the '+' man strummed away on guitar.

They ran through The Knife's 'Heartbeats', which had been popularised in recent years by Jose Gonzalez's acoustic cover.

Swift posted on Instagram: "Me, Ed, Cara. Singing songs in the US ambassador's house. What is life."

The country-pop star meanwhile is due to perform at London's O2 Arena on February 10 and 11.