Keira Knightley is planning to go back to university when her Hollywood career starts to dwindle. The Atonement actress, 22, is convinced the hype surrounding her will eventually subside - but it's this unpredictability that excites her so much about her current profession. And Knightley refuses to fear the end of her movie career, insisting she'll merely pick a new profession of choice and study about it in college. She tells OK! magazine, "I think it (film acting) is a profession that gets blown up and down in an instant, and that's cool, and for me, that's what I find beautiful about it. It's not going to last forever, so at some point I will have to move on, and I'll do something else, and that's fine. "I haven't got a clue what it is, but when I do know, I'll go back to university, I'll study something, and I'll become it."