The Nutty Professor (1963)

Nerd. Milquetoast. Klutz. These are just three of the many undesirable words that can be used to describe Professor Julius Kelp. But all that changes when the chemistry expert invents a potion that transforms him into a suave, sexy chick magnet, whom Julius aptly names Buddy Love. Unfortunately, there's one side effect: Buddy can't control when he'll change back into Julius, an event that always happens at inopportune times. How will Julius/Buddy resolve his Jekyll-and-Hyde dilemma?