Trivia: Dan Radcliffe had to spend six months training followed by 3 weeks training in a tank to film the underwater scene. It took so long because they had to film in small increments, because since Harry grew gills, Radcliffe had to hold his breath the whole time; he wasn't allowed to breathe out on film.
Trivia: In 2004, rumors circulated on the Internet that Rowan Atkinson and John Malkovich were considered for the role of Lord Voldemort. Both rumors were proven to be false; Malkovich was an odd topic of rumor since, as an American, he wouldn't have been able to audition in the first place.Cubs Fan
Trivia: The voice of the radio announcer at the beginning of the film is that of the director, Mike Newell.