Number 46 - Rachel McAdams

You'll know her face, but you should know it better: gorgeous Canuck McAdams has reportedly missed out on roles in The Fantastic Four, The Dark Knight and Casino Royale.

She also turned down the famous Vanity Fair 'nude' cover – the one with Keira Knightley and Scarlett Johansson – quite possibly because she took an inexplicable break around 2006 and went travelling/bought a house at the exact moment Hollywood thought she was about to go massive.

But the eco-chick, who rides a bike and has no car, is not big on regrets and is as happy acting as she is working on her website, greenissexy.org, where she describes herself as having developed an obsessive compulsive disorder for unplugging anything with a plug.