Emma Watson's biggest move since Harry Potter
27 September 2012 Last updated at 00:10 BST
Emma Watson - best known for playing Hermione Granger in the Harry Potter films - is starring in a new film called The Perks of Being a Wallflower.
She has taken on the role of an American high school student in an environment that is very different from Hogwarts.
Talking Movies' Tom Brook reports.
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