- Actor-Inspired Element: Geoffrey Rush modeled his character's look off John Waters. It was only afterwards that they realised how much he resembled Vincent Price from the original - and the director rolled with it.
- Awesome, Dear Boy: Taye Diggs took a role in the film when he heard Geoffrey Rush had signed on.
- Billing Displacement: Ali Larter - who was only on her third film - is billed sixth, despite Sara being a major protagonist.
- Deleted Role:
- The actual Jennifer Jenzen originally featured, played by Debi Mazar, but her scenes were deleted.
- Marc Blucas and Ivana Millicevic filmed a short Film Within a Film sequence that was cut. It's included on the DVD.
- Deleted Scene: Two. The reason that Sarah survived is because her roommate gave her the invitation, and Vannacutt leading Sarah's roommate to her death.
- Dueling Movies: With the same year's The Haunting remake. To the surprise of many, this film actually ended up being better-received and comparatively more profitable, despite the Haunting remake featuring a much larger budget and advertising campaign, and the backing of Steven Spielberg.
- Fake American: Geoffrey Rush is Australian. Famke Janssen (Dutch) is a marginal example, as she has the accent naturally.
- Hey, It's That Place!: The roller coaster, "Terror Incognita", is actually The Incredible Hulk Coaster at Universal's Islands of Adventure.
- No Stunt Double: Famke Janssen did the stunt where the glass ceiling breaks herself.
- Orphaned Reference: Sara's overcoat inexplicably vanishes as the film goes on. She lost it in a deleted scene.
- Refitted for Sequel: The creature effects during the underwater hallucination were planned for Ghost Story but ultimately not used. Dick Smith did make-up on both.
- Stunt Casting: Chris Kattan was cast to essentially play himself and provide comic relief.
- What Could Have Been:
- An alternate ending was in the shooting script, where Price dies from the Darkness on top of the staircase instead of Pritchett, and Eddie dies saving Sara instead of Price. Pritchett and Sara make it outside to be found by the cleaning crew. The movie ends with a television report on the events.
- Christopher Lee was scripted to be the host of the 'Terrifying but True' TV show. In the finished film, Peter Graves is the host.
Trivia / House on Haunted Hill (1999)