Actor David Thewlis (Remus Lupin) was in Toronto, Ontario, Canada today for the International Festival of Authors, and gave his reaction to the news from Harry Potter author J.K. Rowling regarding Dumbledore. The actor said that he was surprised, because while he was filming “Harry Potter and the Prisoner of Azkaba” director Alfonso Cuaron had the idea that Lupin was gay,”and he described my character like a ‘gay junkie’ .”
Source: TLC