Dean Martin stepped into the role of Michael Whiteacre when Tony Randall became indisposed. It was a move that solidified Martin's solo film career after his split from Jerry Lewis two years earlier.
Eddie Fisher wrote in his autobiography "Been There, Done That" that he very much wanted and almost won the role of Michael Whiteacre, the part played by Dean Martin. Fisher says that producer Al Lichtman promised him a part in his next film. Unfortunately, Lichtman passed away on Feb. 20, 1958, shortly before this film was released, so that never happened.