Trivia: The castle that is seen in the movie is an actual house in Austin, Texas, where much of the movie was filmed. An interesting point is that it is merely a facade; the rest of the house behind it is normal.
Trivia: Orchard house, the house in the movie, is actually the house that Little Women's author, Louisa May Alcott was raised in.
Trivia: In the 40th anniversary re-mastered edition they have used Audrey Hepburn's original singing track for the "Wouldn't it be lovely" song.
Trivia: In the scene with George swinging from the Bay Bridge in San Francisco, that's actually Brendan Fraser, not a stuntman. He enjoyed the rush so much that he requested an extra take just to swing again.
Trivia: The costume department tried in vain to produce Luna's radish-like earrings. Evana Lynch made her own - they're the ones she wears in the film.
Trivia: When the narrator asks George what happened to the original George, George states that the studio was too cheap to re-hire Brendan Fraser. The studio did want to bring back Brendan Fraser for the sequel, but he turned down the role.
Trivia: Originally, the store Buddy and Jovie work in was supposed to be a Macy's. However, Macy's quickly dropped out of the project when they got the script and saw that there was a scene where Buddy confronts a fake mall-Santa in the store for not being the real Santa. Reportedly, Macy's representatives indignantly told the studio that "Macy's Santa is the REAL Santa!"
Trivia: This was the last Disney movie to include "A Walt Disney Production" at the end, as well as the first movie to be completed after Disney's death in 1966.
Trivia: When making this movie, Walt Disney turned the script into a comic at first and they used these "comic strips" to move around shots and scenes, replace things and generally see what would work or not. This technique is now known as storyboarding and pretty much every single movie production uses it.
Trivia: Cesar Romero refused to shave his moustache for the role of Joker, so it's still visible under his makeup.
Trivia: James Cromwell was a long time vegetarian, but decided to become vegan after playing Hoggett in Babe.
Trivia: Marc McClure, who plays the delivery driver named Boris actually played Anna's (she was then called Annabelle) crush, Boris, in the original "Freaky Friday" (1976).
Trivia: A relief carving of Sulley (from the following Pixar film, Monsters University) is visible in the Witch's cottage.