English big-screen star Keira Knightley has revealed that playing a singer-songwriter in the new movie 'Begin Again' was challenging and while she isn't too fond of her own voice, co-star Adam Levine was very supportive of it. 

Speaking to London's Metro newspaper, the actress admitted that Levine, of Maroon 5 fame, praised her vocal ability although she isn't sure if she believes his praise and thinks he might have just been being polite:

Knightley confessed: "He kindly said that if I sang on 'The Voice', he'd turn his chair around - but I know he wouldn't."

When asked if she enjoyed her role in the movie, Knightley explained that it was a great experience, but playing a singer-songwriter is something she probably wouldn't volunteer to do again as she isn't used to it:

"It was fine, but I wouldn't necessarily do it again. It's not really what I do for a living but it was interesting. People who are singers - that's how they naturally express themselves, how they think, and it isn't for me."

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Watch the lyric video for 'Lost Stars', which features in the movie, here: