Busman's Honeymoon is a 1940 British detective film directed by Arthur B. Woods. An adaptation of the 1937 Lord Peter Wimsey novel Busman's Honeymoon by Dorothy L. Sayers, Busman's Honeymoon stars Robert Montgomery, Constance Cummings, Leslie Banks, Googie Withers, Robert Newton and Seymour Hicks as Mervyn Bunter.

Lord Peter Death Bredon Wimsey is the fictional protagonist in a series of detective novels and short stories by Dorothy L. Sayers. A dilettante who solves mysteries for his own amusement, Wimsey is an archetype for the British gentleman detective. He is often assisted by his valet and former batman, Mervyn Bunter; by his good friend and later brother-in-law, police detective Charles Parker; and, in a few books, by Harriet Vane, who becomes his wife.