Taylor Swift and Zayn Malik drop song for next Fifty Shades film

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Taylor Swift and Zayn Malik have surprised fans by releasing a new song for the next Fifty Shades film.

The stars dropped a snippet of the track, I Don't Wanna Live Forever, on their Twitter accounts.

Taylor Swift
Taylor Swift (Richard Shotwell/AP)

The ballad will feature on the soundtrack for Fifty Shades Darker, starring Dakota Johnson and Jamie Dornan, which is released in February.

Lyrics include: "Baby, baby, I feel crazy/Up all night, all night and every day/I give you something, oh, but you gave me nothing/What is happening to me?"

Former One Direction star Zayn, 23, posted an image of the pair on Instagram, cuddling one of Taylor's cats.

Jack Antonoff, who co-wrote the song, said on Twitter: