'Nina Foch', who played John Ritter's mother-in-law in the film, was originally Ritter's acting coach when he was a student at Hollywood High School and he was really nervous when he met up with her again on the set of the movie.
The screenplay was originally adapted with Dudley Moore in mind. However, Moore felt the part was too similar to 10 (1979) and the recently completed Arthur 2: On the Rocks (1988). Moore declined the role which led to a rift between him and director Blake Edwards.
The original title of the script was "11" and it was going to be a sequel to the hit film "10". However, Edwards only got halfway through writing it when he found out or realized Moore would not be returning. So he took what he had, changed the names and continued writing it as an original script.
Raye Hollitt (Lonnie) was the muscular warrior, "Zap", in the late-'80s version of "American Gladiators".
Diana Barton's debut.