Groucho Marx as Rufus T. Firefly

Harpo Marx as Pinky

Chico Marx as Chicolini

Zeppo Marx as Bob Roland

Margaret Dumont as Gloria Teasdale

Raquel Torres as Vera Marcal

Louis Calhern as Ambassador Trentino

Edmund Breese as Zander

Leonid Kinskey as Sylvanian Agitator

Charles Middleton as Prosecutor

Edgar Kennedy as Street Vendor

Edward Arnold as Politician (uncredited)

Wade Boteler as Officer at Battle Headquarters (uncredited)

Sidney Bracey as Mrs. Teasdale's Butler (uncredited)

E.H. Calvert as Officer in Battle Sequence (uncredited)

Davison Clark as Minister of Finance #2 (uncredited)

Louise Closser Hale as Reception Guest (uncredited)

Carrie Daumery as Reception Guest (uncredited)

Maude Turner Gordon as Reception Guest (uncredited)

Florence Wix as Reception Guest (uncredited)

Joseph Crehan as Dignitary at Reception (uncredited)

Mario Dominici as Minister (uncredited)

Edmund Mortimer as Minister (uncredited)

Charles West as Minister (uncredited)

Verna Hillie as Trentino's Blonde Secretary (uncredited)

Edward LeSaint as Secretary of Labor (uncredited)

George MacQuarrie as First Judge (uncredited)

Frederick Sullivan as Second Judge (uncredited)

Eric Mayne as Third Judge (uncredited)

Edwin Maxwell as Freedonia's Secretary of War #1 (uncredited)

Dennis O'Keefe as Bridegroom at Firefly's Reception (uncredited)

Leo Sulky as Agitator (uncredited)

Dale Van Sickel as A Palace Guard (uncredited)

William Worthington as First Minister of Finance (uncredited)