Jamie Lee Curtis had cut her hair shorter after filming Halloween (1978) and had to wear a wig that matched her original hairstyle for the film.
The original idea for “Halloween II” was that it would take place in a high rise apartment building a few years after the events of Halloween.
Debra Hill told Fangoria Magazine in 1981 that there was consideration to make Halloween II a 3D film but it proved to be “far too expensive” and wouldn’t work with night shooting.
When composing the music for Halloween II, Alan Howarth used John Carpenter’s original score from Halloween and added his tracks on top. If you listen closely you can hear Carpenter’s piano.
Nancy Kyes (Loomis) who plays Annie made a cameo appearance for Halloween II and she was also the voice on the phone talking to Alice.
Saturday Night Live Alum and Wayne’s World star Dana Carvey has a brief cameo in this film. You can see him right before Loomis, Brackett and Hunt arrive at the Wallace house.
When Alice is on the phone with Sally, she tells her the murders happened on Orange Grove. This is the actual name of the street where the Wallace & Doyle house are located in West Hollywood.
The voice that says “I’ve been trick-or-treated to death tonight!” in the theatrical trailer is not the same as the one in the movie. Tommy Lee Wallace recorded the line for the film.
John Carpenter directed the scene where the Boom Box Boy runs into Michael in Haddonfield town square. The boy was played by Dick Warlock’s (Michael Myers) son Lance.
Actress Pamela Susan Shoop (Karen) got an ear infection during filming of her death scene as the water in the hot tub was apparently according to her was “none too clean”.
John Carpenter had intended for Halloween II to be the final film for Michael Myers and Dr. Loomis and blew both of them up at the end thinking that was it… until Halloween 4 came out in 1988!
Dick Warlock is the shortest Michael Myers in the entire series. In fact, he wore lifts in order to appear taller.
Halloween II – © 1981 Universal Studios