Trivia: According to director James Wan on the director's cut DVD commentary, the major plot twist of the film, from Adam listening to Zep's tape to Jigsaw standing up, was one continuous shot, and was also the only shot they did of the sequence.
Trivia: When Shaun is on the phone to his mum, Ed shouts "We're coming to get you Barbra". This is a tribute to the famous "they're coming to get you Barbra" line from Night of the Living Dead (1968).
Trivia: The method by which Alice disposes of the zombie dogs (by throwing a flaming object into a gas filled kitchen) is similar to one of the numerous ways Jill Valentine defeats Nemesis in 'Resident Evil 3'.
Trivia: One should really stay to the very end of the credits, as Johnny Depp (Mort) sings an amusing little tune.
Trivia: The Chinese tattoo on Bill's arm reads Wo de shi jie, which means "My world."
Trivia: Ryan Reynolds gained 11kg (or roughly 24lbs) of muscle for his role as Hannibal King.
Trivia: When Van Helsing is fighting Dracula towards the end as a werewolf, he stops to get out his claws. This is an obvious reference to Wolverine, whom Hugh Jackman played in both "X-Men" movies.
Trivia: The Saeki family, the ghost family that haunts and terrorizes everyone who enter their home, are no strangers to the Grudge franchise. They played the same characters in the movie Ju-On, the Japanese version of The Grudge.
Trivia: This film is actually the second version of "Exorcist: The Beginning" to be filmed and completed. But upon seeing the first version, the studio protested the film was based too much on the characters and wasn't the gore-fest they wanted, so they hired a new director and reshot the entire movie with a different script. The original version of the movie was recently released on video as "Dominion: Prequel to the Exorcist."
Trivia: Even though he shares top billing with Angelina Jolie and Ethan Hawke, Kiefer Sutherland is on screen for less than three minutes.
Trivia: This "prequel" to "Ginger Snaps" was shot back-to-back with the sequel "Ginger Snaps: Unleashed."