She's only 21 - but Hollywood star Keira Knightley says she needs to take time off.

The Pirates of the Caribbean actress says she desperately needs a rest.

She told Hello magazine: "It's my instinct to think, 'I have to say yes or there won't be another job'.

"But I've been working on films back to back for the past few years and I need a break.

"I think I just need to take time out to get a bit more of my own life back.

"If that means I have to go to the back of the queue as far as acting is concerned, then I just have to accept that."