Duck Soup

Groucho Marx Rufus T. Firefly

Harpo Marx Pinky

Chico Marx Chicolini

Zeppo Marx Bob Roland

Margaret Dumont Gloria Teasdale

Raquel Torres Vera Marcal

Louis Calhern Ambassador Trentino

Edmund Breese Zander

Leonid Kinskey Sylvanian Agitator

Charles Middleton Prosecutor

Edgar Kennedy Street Vendor

Edward Arnold Politician (uncredited)