The Happiest Millionaire (1967)

A happy and unbelievably lucky young Irish immigrant, John Lawless, lands a job as the butler of an unconventional millionaire, Biddle. His daughter, Cordelia Drexel Biddle, tires of the unusual antics of her father--especially since the nice young men around town all fear him. Wouldn't you fear a father-in-law that keeps alligators for pets and teaches boxing at his daily Bible classes?