Groucho Marx as Otis B. Driftwood

Chico Marx as Fiorello

Harpo Marx as Tomasso

Kitty Carlisle as Rosa

Allan Jones as Ricardo Barroni

Sig Ruman as Gottlieb

Walter Woolf King as Lassparri

Robert Emmett O'Connor as Henderson

Margaret Dumont as Mrs. Claypool

Edward Keane as Captain

Evelyn Selbie as The Fortune Teller in 'Trovatore' (uncredited)

Purnell Pratt as The Mayor of New York (uncredited)

Jonathan Hale as The Stage Manager (uncredited)

Otto Fries as Otto the Elevator Operator (uncredited)

Gino Corrado as First Porter (uncredited)

Bess Flowers as Ship Passenger (uncredited)

Chuck Hamilton as Policeman (uncredited)

Frank McLure as Manager's Assistant (uncredited)

William H. O'Brien as Stagehand (uncredited)

George Irving as Committeeman (uncredited)

Billy Gilbert as Orchestra Member Asking Fiorello Not to Play Piano (uncredited)

Ruth Cherrington as Opera Spectator (uncredited)

Al Bridge as Immigration Inspector (uncredited)

Selmer Jackson as Committeeman (uncredited)

Jack 'Tiny' Lipson as Engineer's Assistant (uncredited)

Stanley Blystone as Ship's Officer (uncredited)

Wedgwood Nowell as Ship Passenger (uncredited)

King Baggot as Dignitary (uncredited)

John St. Polis as Opera Conductor (uncredited)

Bud Geary as Stagehand (uncredited)

Rolfe Sedan as Aviator (uncredited)

Sam Appel as Dungeon Guard (uncredited)

Stephen Soldi as Ship's Steward (uncredited)

Purnell Pratt as Mayor (uncredited)

Evelyn Selbie as Fortune Teller (uncredited)

Jay Eaton as Aviator (uncredited)

Harry 'Zoup' Welsh as Ship's Steward (uncredited)

Gloria Delson as Child (uncredited)