Trivia: Although they play father and daughter in this film, John Turturro (born 1957) is only seven years older than Monica Bellucci (born 1964).
Trivia: In the English dub of the film, Anna Paquin voices Ray Steam, Alfred Molina voices Edward (Ray's father) and Patrick Stewart voices Lloyd (Ray's grandfather). The three also share another connection in real-life. Paquin and Stewart co-starred in all three "X-Men" films, which were created by Marvel, and Molina starred in another popular Marvel comic-turned-film, when he appeared as the villain in "Spider-Man 2."
Trivia: Co-star Suzanne Shepherd first read the script, and was absolutely horrified by the explicit sexual content. She broke down crying and begged to not do the film. However, she changed her mind when she met director John Waters, who managed to convince her to stay on.
Trivia: When Crichton talks to "Harvey" (Scorpius in his head) for the first time in the movie, Scorpius is dressed like Einstein. There is a blackboard with equations on it. One of them is "e = MC hammer". (00:21:30)
Trivia: Michael Caine, who plays Henry Lair, is only 10 years older than his on-screen son Christopher Walken (Turner Lair).
Trivia: Charles Band, co-creator of both franchises, sold the rights to this crossover film to the Sci-Fi Channel so it could be made. He primarily did it for the money because his studio, Full Moon, was struggling financially. Band later expressed regret for this decision, as the film is of a noticeably poor quality. Additionally, director Ted Nicolaou has said he regrets making the film and feels it turned out poorly. He wasn't a fan of the franchises and only took the job to get much-needed work.