This is the first feature film to have a fully computer-generated visual effects character in a leading role.
The town of Friendship, Maine is the name of a real village in mid-coast Maine, near Camden and Rockport, where scenes from the movie were filmed.
In the mirror scene, Dr. James Harvey was going to transform into Steven Spielberg. Spielberg filmed the cameo, but it was cut for pacing reasons. Spielberg was relieved, feeling he was a terrible actor.
During filming, Bill Pullman and Christina Ricci had to talk to tennis balls in place of the ghosts, while the ghosts were added later on.
The house that was used for Whipstaff Manor was also used to film scenes from the Backstreet Boys' music video, "Everybody (Backstreet's Back)". Most notably is the ballroom dance sequence from this music video.
Don Novello: As Father Guido Sarducci (from Saturday Night Live (1975)), the Catholic priest Carrigan Crittenden hires to perform an exorcism on the mansion.
Rodney Dangerfield: One of the people into whom Dr. Harvey turns while possessed by The Ghostly Trio.