Professional dancer Yvonne De Carlo persuaded director Anthony Kimmins to talk Sir Alec Guinness into doing the mambo with her in a night club sequence. Guinness, not usually thought of as a physical actor, consented to a week's worth of dance lessons from De Carlo and the sequence is one of this movie's highlights.
Henry's (Sir Alec Guinness) quote, "We cultivate the faculty of patient expectancy..." is taken from G.K. Chesterton: "I am cultivating the faculty of patient expectancy."
Became the Broadway musical "Oh, Captain!" with music and lyrics by Jay Livingston and Ray Evans, and the book by Al Morgan and José Ferrer. The original cast included Tony Randall as Captain Henry St. James, Abbe Lane, Susan Johnson, Jacquelyn McKeever, Edward Platt, Paul Valentine, and Stanley Carlson, with Ferrer further directing. Excluding previews, it opened on February 4, 1958 at the Alvin Theatre, and ran for one hundred ninety-two performances until July 19, 1958.
It is stated indirectly near the end of the movie that Henry is sixteen years older than Maud, and "Jimmy" is twenty-three years older than Nita. At the end of the movie, Henry/Jimmy is fifty-three, Maud thirty-seven and Nita thirty.
Was mentioned in a plot for the television series Car 54, Where Are You? (1961), specifically Toody's Paradise (1962).