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8. Natalie Portman and Keira Knightley
Keira Knightley was chased down by Natalie Portman fans; sounds like a weird TMZ headline but it really did happen. The British actress shared how she was mistaken for the Black Swan star. They both play very different roles though, with Knightley always bringing a rebellious spirit through her portrayals, like in Pirates of the Caribbean, whereas Portman usually plays a bit serious and calm role. There are some strange similarities too; Keira also played a small part in a Star Wars film and both of the actresses debuted around the same time!