Taylor Swift and Zayn Malik release 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.

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 Malik, 23, posted an image of the pair on Instagram, cuddling one of Swift's cats.

Jack Antonoff, who co-wrote the song, said on Twitter: "I Don't Wanna Live Forever came together very quickly. Wrote it with Taylor and Sam Dew and produced it at home ...

"Recorded Taylor at my house. Zayn sent parts from LA - we did it in a week basically. I've never had something come out that quick.

"Loved making this song with Taylor, Sam and Zayn."