Duck Soup is a 1933 American pre-Code musical comedy film written by Bert Kalmar and Harry Ruby and directed by Leo McCarey. Released by Paramount Pictures on November 17, 1933, it stars the four Marx Brothers and also features Margaret Dumont, Louis Calhern, Raquel Torres and Edgar Kennedy. Duck Soup was the last of the five Marx Brothers films released by Paramount Pictures. In the film, Groucho portrays Rufus T. Firefly, the newly installed president of the fictional country of Freedonia. Zeppo is his secretary, while Chico and Harpo are spies for the neighboring country of Sylvania. Relations between Firefly and the Sylvanian ambassador (Calhern) deteriorate during the film, eventually leading the two countries to war.