Rupert Grint was the first star to step out of his car at this evening's Harry Potter and the Deathly Hallows world premiere in London. He was swiftly followed by Emma Watson in a LBD. Rupert spoke about the journey Ron goes on in this film, and how the character becomes jealous, paranoid, and aggressive. He said it was fun to do something completely new and to see a darker side to him. We've seen Rupert as Ron through the years, and he's become a man in front of our eyes. You can test your knowledge of film stills, the books and the stars, and check out the rest of our Harry Potter coverage. We've got more coming!