BIG BANG THEORY FTW!!!Yeah, Natalie Portman and Kiera Knightley definitely look similar, too. I dunno, I just feel like Olivia Wilde has a very similar facial structure.
*Edit* Also, I'm going to have to completely agree with your list ZippyDee. I do appreciate the work of all those actors you mentioned.
However, I never thought Natalie Portman and Oliva Wilde looked similar. I always seem to get Natalie Portman confused with Keira Knightley for some reason. O.O As for Oliva Wilde; I've liked her ok so far, But I've only seen her in the new Tron movie and Cowboys and Aliens.