[Gloucester, October 29. Image via Getty]

GLOUCESTER, ENGLAND - OCTOBER 29: Harry Potter fans dressed in character costumes sit in the cloisters as they wait to see the film Harry Potter and the Half-Blood Prince on a giant screen inside Gloucester Cathedral on October 29, 2009 in Gloucester, England. Some of the scenes in the latest Harry Potter installment were filmed inside the Cathedral, which dates back over 900 years. The historic cathedral cloisters were transformed into the corridors of Hogwart's School of Witchcraft and Wizardry in the films of JK Rowling's first two books - Harry Potter and the Philosopher's Stone and Harry Potter and the Chamber of Secrets and also the more recent Harry Potter and the Half-Blood Prince. (Photo by Matt Cardy/Getty Images)