The Battle of the Sexes is a 1959 British black and white comedy film starring Peter Sellers, Robert Morley, and Constance Cummings, and directed by Charles Crichton. Based on the short story "The Catbird Seat" by James Thurber, it was adapted by Monja Danischewsky. A timid accountant in a Scottish Tweed weaving company cleverly bests a brash modern American efficiency expert whose ideas threaten his way of life.