On Tuesday night, British celebs -- and Anne Hathaway -- turned out to celebrate the premiere of "One Day," a new romance film starring Hathaway and Jim Sturgess as a couple whose love affair and friendship spans more than 40 years. For some reason, the casting agents couldn't find an actual British person to play opposite Sturgess, so Hathway instead does her best Molly Britishwomanlady accent throughout. But enough about strange casting choices, what did they wear to the premiere? And what weird little British moppet actually turned out kind of stealing the sartorial show? Find out after the jump!