Hollywood star Keira Knightley's rapid rise to fame has come at a price - the 21-year-old actress is exhausted and desperate for a break. Knightley has starred in a series of blockbuster films, including Pride And Prejudice and the two PIRATES OF CARIBBEAN movies, since getting her big screen break in 2002's Bend It Like Beckham. But the hard work has taken its toll on the British beauty. She says, "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."