Lewis' co-star, Donna Butterworth, made only one other film, Paradise, Hawaiian Style, with Elvis Presley.

Gary Lewis & The Playboys have a cameo in which they sing "Little Miss Go-Go"; their hit song "This Diamond Ring" is also featured.

Willard Woodward, the family chauffeur, takes Donna to all of her uncles to stay with them for two weeks.

As they walk down the hallway, Donna reveals that she knows the truth: "Uncle Everett" is actually Willard in disguise.

[5] Several of the film's characters were caricatured in Will the Real Jerry Lewis Please Sit Down, an animated series.