Airport scenes in this film (and in another John Landis film, Coming to America (1988)) have a call over the PA system for a "Mr. Frank Ozkerwitz" to pick up the white courtesy phone. This is Frank Oz's real name.
The crew of the Kalijak movie were played by the actual crew of this movie. Some crew members have other small roles too.
The garden that Ed and Diana sneak through to get to mansion is the same garden used to depict Steve Martin's character's dream garden in The Jerk (1979)
Director Trademark: [John Landis] [ipanema] the music during the strip scene.
Director Trademark: [John Landis] [SYNW] appears on two posters in the office where Ed and Diana make the phone call.
Director Trademark: [John Landis] [ask for babs] on the Visit Universal Studios title card at the end of the movie.
The movie playing on the television in Hamid's apartment is Bud Abbott Lou Costello Meet Frankenstein (1948). John Landis did the introduction to the complete shooting script of this movie when it was published in 1990.
This was singer Carl Perkins only film.
Counting John Landis, there are 17 directors that make an appearance in the film.
This was the first of Landis's movies to use directors in cameos
According to a recent book on John Landis, John wanted Gene Hackman to play Jeff Goldblum's character but Universal thought he wasn't big enough box office.