During this production Jerry Lewis attached a small video camera to the side of his 35mm camera, in effect, pioneering the "video assist" system that is standard on just about every feature film today.
When Jerry Lewis did his scene with Baby, the African Lion (a.k.a. Zamba), he had a gun in his inside pocket for protection.
Mostly filmed on one of the largest interior sets ever built. The full-scale replica of a multi-story sorority house, constructed to break way to accommodate camera movement, occupied an entire soundstage on the Paramount backlot.
In-jokes: During one of the first scenes where Herbert is on the bus bench, a part of the poster for "Cinderfella (1960)," a previous Jerry Lewis film, can be seen just to the left of the drug store behind him in the alley.
Karyn Kupcinet's first and only movie appearance. She's the snooty girl in the red dress who infuriates Herbert by calling him "Herby". She was murdered two years later, a crime that remains unsolved.