At last night’s UK premiere for the much anticipated My Week With Marilyn (a film set, not coincidentally, in England), Emma Watson looked just lovely in a demure outfit from Jason Wu‘s spring 2012 collection. The film’s star Michelle Williams couldn’t be there, so it was on Watson, who plays Marilyn’s assistant in the film, to provide the old Hollywood glamor. Despite the fact that her outfit could have been sexier for the premiere of a film about one of the greatest sex symbols of all time, I think she held it down pretty well. And she doesn’t play a sexpot in the movie, so perhaps this was more appropriate, anyway.