Monkey Business

Groucho Marx

Groucho

Harpo Marx

Harpo

Chico Marx

Chico

Zeppo Marx

Zeppo

Rockliffe Fellowes

J.J. 'Big Joe' Helton

Harry Woods

Alky Briggs

Thelma Todd

Lucille Briggs

Ruth Hall

Mary Helton

Tom Kennedy

Gibson

Ben Taggart

Capt. Corcoran (uncredited)

Billy Bletcher

Man in Deck Chair

Maurice Chevalier

Himself (voice)

Bess Flowers

Indian's Wife at Party

William H. O'Brien

Waiter

Cyril Ring

Party Guest

Norman Z. McLeod

Director

Will B. Johnstone

Screenplay

S.J. Perelman

Screenplay

Herman J. Mankiewicz

Producer

Arthur L. Todd

Director of Photography

Arthur Sheekman

Additional Dialogue