Knightley: I wouldn't know what to do if I tried music career

Keira Knightley has no plans to swap her career in movies for music after taking on her first major singing role in her latest film 'Begin Again'.

The actress portrays a musician in the romantic comedy which also stars Mark Ruffalo, James Corden and Maroon 5 singer Adam Levine - but is adamant the role hasn't inspired her to make a switch into songs because she has no musical talent.

Despite being married to Klaxons musician James Righton - who unsuccessfully tried to teach her to play guitar - Knightley doesn't go to many concerts or has much interest in music.

She confessed: "I know nothing about music."

Asked whether she planned to make the transition into music, she replied: "I'm the least musical person in the entire world. I wouldn't know what to do!"

Knightley admits she did not give much thought to the singing element of the role until she was handed the lyrics and she was suddenly required to break into song.

The 29-year-old star has had to use her vocal range before, but for a very different project, so she felt completely unprepared.

In an interview with London Go, Knightley revealed: "It was a much more 1940s theatrical thing, so it was completely different from this (part). This is a very different style - I'd definitely not done anything like that."