Emma Watson on BBC Radio in London | Pictures

Emma Watson hit the red carpet in London today for a special screening of The Perks of Being a Wallflower at the Mayfair Hotel. Earlier this morning she wore her glasses for a stop at BBC studios, where she promoted the film. She shared her excitement about being back in the UK on Twitter yesterday, writing, "Yay for Perks! Lovely to be home, London." The movie is being released there on Oct. 3 after a limited opening in the US last Friday — check out our review of Perks.

Emma's visit to BBC wasn't just about her most recent project, though, since talk also turned to Harry Potter. Recently, author J.K. Rowling announced the possibility of a director's cut version of the books, and when asked if Emma would be interested in participating, she responded, "That's so interesting. Sure!"