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: At the ranger's office when the security guard was stealing the medical supplies, you see a cameo of M. Night Shamalayan in the reflection of the glass.
Trivia: One should really stay to the very end of the credits, as Johnny Depp (Mort) sings an amusing little tune.
Trivia: Often times when a movie is distributed the name of the movie on the actual can is changed or altered to prevent piracy. The name on this movie was "Hal," a reference to "2001: A Space Odyssey" (1968).
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 Scooby and Shaggy are at a club, Shaggy talks to Mr. Wickles. He says something about Scooby's nose. The man who is sitting next to Scooby is Neil Fanning, the man who does the voice of Scooby-Doo.
Trivia: During the controversial bathtub scene, Cameron Bright was never naked and he and Nicole Kidman were never even in the same room during the filming of the bath scene, apart from one camera shot, and when this shot happened both actors wore special clothes that were not visible to the camera.
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: Even though he shares top billing with Angelina Jolie and Ethan Hawke, Kiefer Sutherland is on screen for less than three minutes.
