powered by AFI
Although most sources list a running time of 80 or 81 minutes, Variety lists the picture as 70 minutes long for its New York opening. According to a production chart and the review in Hollywood Reporter, Clarence Brown directed portions of the picture for a brief period during W. S. Van Dyke's illness. According to various news items in Daily Variety and Hollywood Reporter, M-G-M originally bought the short story "Beauty and the Beat" for Myrna Loy and Robert Montgomery. Because Loy and Montgomery already had too many assignments, a re-write of the script was made to turn the picture into a vehicle for Montgomery and Jean Harlow, and later as a film for Harlow and Robert Taylor. In mid-June 1936, an Hollywood Reporter news item announced that Victor Fleming was to direct Harlow in the film. A short time later, Joan Crawford, Clark Gable and Robert Young were announced as the stars. Franchot Tone replaced Young just after the start of production. Production was delayed for several weeks when Van Dyke was assigned to complete the direction of The Devil Is a Sissy, and studio executives considered hiring another director for Love on the Run. In one of the film's scenes, Tone's character tries to cheer up Crawford's character with the following joke: "Knock-knock," "Who's there?," "Machiavelli," "Macchiavelli who?," "Machiavelli good soup for ten dollars." According to modern sources, "knock-knock" jokes began in 1936. This May have been the first of its type ever filmed.