Scarlett Johansson
I fell in love with her when I first saw Lost in Translation. Her minimalistic, graceful way of acting, her deep, kinda husky voice (grrreat accent - I love how she says words like "actually") - that's what caught my attention. And, of course, looks - incredible lips and a beautiful smile (I love her way of laughing). Also, great boobs - I can't deny it She seemed like a really nice and intelligent girl. I became an instant fan and absolutely loved her in The Girl With a Pearl Earring (sadly, this was her last artistically demanding role).
Oh, I also like how she changes her image from time to time (most women do that, don't they?). More than that - dark hair suits her just as well as blonde hair.