Fourth and final film made by MGM British Studios before it closed for the duration of WWII.
Maureen O'Sullivan was to appear in the film as Harriet and sailed on the Queen Mary for London, but she returned to the USA after the film was shelved because of the war.
Robert Donat pulled out of the film at the last minute, and was replaced by Robert Montgomery, who happened to be in Britain on other business.
Richard Thorpe was the original director starting 4 August 1939, traveling to various locations in England. World War II started in early September, and the film was shelved until March 1940 with Arthur B. Woods as director.
This movie was "based on a 1936 play co-authored by Sayers [Dorothy L. Sayers] that she later reworked into the novel 'Busman's Honeymoon'," according to the film's Warner Archive Collection DVD sleeve notes.