Harry Potter actors David Thewlis (Remus Lupin), Rhys Ifans (Xenophilius Lovegood), Jamie Campbell Bower (Gellert Grindelwald), and Bonnie Wright (Ginny Weasley) attended Tuesday evening's 55th BFI London Film Festival premiere of Anonymous, the story about the possibility that William Shakespeare (played by Ifans) did not write all of his famous plays. Photos from the red carpet gala, at the Empire Leicester Square in London, can be found in our galleries. The film is set to hit U.S. and U.K. theatres this Friday; tickets can be ordered at Fandango.