The movie was originally set to be released on September 21st 2001, but producers wanted the film to be stronger, so re-shoots took place from September to October 2001.
Director Rick Rosenthal previously directed Halloween II (1981) - 21 years earlier.
Bianca Kajlich was originally cast in a role of Jenna Danzig.
Katee Sackhoff originally was supposed to portray Donna Chang.
Jamie Lee Curtis was contractually obligated to do at least a 30-second cameo, but she liked the script so much that she increased her involvement in the opening scene.
Tyra Banks' death was cut. You can still see the aftermath in the movie.
A picture of Josh Hartnett who played her son John in H20, can be seen on the wall above Laurie's bed in the sanitarium.
DIRECTOR CAMEO: college professor lecturing Sara's class near the beginning of the film.
Three endings were shot regarding the fate of Freddie Harris (Busta Rhymes).
