It was to be just another night out for the 19-year-old actress as she arrived in London for the premiere of The Wizard of Oops - no wait, wrong movie!
Beautiful Emma Watson turned the Harry Potter and the Half Blood Prince event into a oglefest as the wild London weather blew off her dress to reveal underwear. The hassled star was quick to get some help and continued signing autographs for fans, who got a little more than just a movie!
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