Diane McBain was originally announced for role of a female magazine editor that apparently was written out of final script.
Character actress Cheerio Meredith who played the part of the old lady in the antique car driven by Burt Mustin died on the day of the film's premiere.
Final film of Otto Kruger
There are many jokes with references to Jack Lemmon and Some Like It Hot, with Lemmon and Tony Curtis--Curtis dressing as a woman in one scene, for example.