Trivia: A little foreshadowing - when the King first goes to the Poison Apple pub, a frog with ruby red lips asks him if she has met him before.
Trivia: In order to acquaint himself with his three lead actors, director Alfonso Cuaron had each of them write an essay about their characters, from a first-person point of view. Emma Watson, in true Hermione fashion, went a little overboard and wrote an 16-page essay, Daniel Radcliffe wrote a simple one page paper, and Rupert Grint never even turned his in, as he said that is what Ron would have done.
Trivia: The two old men near the end, talking about it being "old school" are voiced by Frank Thomas and Ollie Johnston, two Walt Disney animators who worked on such classics as Bambi and Cinderella.
Trivia: If you look at the poster advertising the play "The Marvelous Marriage," you'll see it was written by Al Funcoot. "Al Funcoot" is an anagram of Count Olaf. This is a common theme in the Lemony Snicket Books.
Trivia: The BPRD complex was (according to Del Toro) was originally FDR's secret emergency bunker. The library where Professor Broom dies was the president's office and Hellboy's room (with the big vault door) was his fallout shelter, just in case Germany perfected the A-bomb first.
Trivia: Before the film was released, N.A.S.A. sent a memo out to all of its employees stating that they were not allowed to comment on the likelihood of the events portrayed in this movie.
Trivia: Viggo Mortensen liked the horse that was used in the movie so much that he bought it.
Trivia: When Ben is talking to Riley in front of the Lincoln Memorial, you see a long pool behind them. This pool is filled with computer generated water, because the pool was drained at the time of shooting.
Trivia: The Chinese tattoo on Bill's arm reads Wo de shi jie, which means "My world."
Trivia: The "Montage" song is actually from an episode of South Park (Parker and Stone's TV show) called "Asspen," where Stan learns how to ski in a similar montage style.
Trivia: The photo of Nicky in her confidential file is actually a promotional shot taken of Julia Stiles (Nicky) in 1999 for her movie "10 Things I Hate About You."
Trivia: When Marty is aiming the gun and preparing to shoot, he is saying his teachers names. All of the names of the "teachers" are actually names of the crew members.
Trivia: This film was supposed to be Steve Coogan's ticket to Hollywood stardom, but it was not to be. The film tanked at the box office, losing almost US$80,000,000. This is the biggest loss by any independent film ever, and it bankrupted its producers.