Groucho Marx
Otis B. Driftwood

Chico Marx
Fiorello

Harpo Marx
Tomasso

Kitty Carlisle
Rosa

Allan Jones
Ricardo Barroni

Sig Ruman
Gottlieb

Walter Woolf King
Lassparri

Robert Emmett O'Connor
Henderson

Margaret Dumont
Mrs. Claypool

Edward Keane
Captain

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

Purnell Pratt
The Mayor of New York (uncredited)

Jonathan Hale
The Stage Manager (uncredited)

Otto Fries
Otto the Elevator Operator (uncredited)

Gino Corrado
First Porter (uncredited)

Bess Flowers
Ship Passenger (uncredited)

Frank McLure
Manager's Assistant (uncredited)

William H. O'Brien
Stagehand (uncredited)

George Irving
Committeeman (uncredited)

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

Ruth Cherrington
Opera Spectator (uncredited)

Al Bridge
Immigration Inspector (uncredited)

Selmer Jackson
Committeeman (uncredited)

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

Stanley Blystone
Ship's Officer (uncredited)

Wedgwood Nowell
Ship Passenger (uncredited)

King Baggot
Dignitary (uncredited)

John St. Polis
Opera Conductor (uncredited)

Bud Geary
Stagehand (uncredited)

Rolfe Sedan
Aviator (uncredited)

Sam Appel
Dungeon Guard (uncredited)

Purnell Pratt
Mayor (uncredited)

Evelyn Selbie
Fortune Teller (uncredited)

Jay Eaton
Aviator (uncredited)