The movie's opening title song was sung by co-lead star Annette Funicello with back-up vocals from The Beach Boys.
Tommy Kirk was allowed to return to make this Disney sequel after he had been fired by the company in 1963 when he was caught having sex with a 15-year-old boy at a leisure center in Burbank.
Tommy Kirk was asked by Disney to reprise his role in this film after Walt Disney had terminated his contract prior to the film.
Judy the Chimpanzee used to sit in Walt Disney's lap all the time. After waiting in line with everybody else to get her coffee and doughnut just before work, then get her sugar, Judy would go over to Disney's director chair sit in his lap, and never get a crumb on him and never spill a drop.
Judy the Chimpanzee was on the stage playing the tambourine with the The Beach Boys in the opening scene.