Jerry Lewis' musical entrance down the grand staircase was done in one take, a Lewis trademark. But his seven-second rush up the same 63 steps put too much of a strain on his heart and landed him in the hospital. In a 2011 interview Lewis said he suffered his first heart attack while making this film.
Some exteriors were shot at the Bel Air, California mansion also used in The Beverly Hillbillies (1962).
The dream car in the movie is the Golden Sahara, built by custom car king George Barris in 1955, based on a 1953 Lincoln Capri.