Dr. Hugo Z. Hackenbush

Groucho Marx

Tony

Chico Marx

Stuffy

Harpo Marx

Emily Upjohn

Margaret Dumont

Gil Stewart

Allan Jones

Judy Standish

Maureen O'Sullivan

Whitmore

Leonard Ceeley

Dr. Leopold X. Steinberg

Sig Ruman

J.D. Morgan

Douglas Dumbrille

"Flo"

Esther Muir

Sheriff

Robert Middlemass

Solo Dancer

Vivian Fay

Specialty Dancer

Vivien Fay

Dr. Wilmerding

Charles Trowbridge

Specialty Singer

Ivie Anderson

Doctor

Frank Dawson

Man Boarding Bus (uncredited)

Gino Corrado

Doctor

Max Lucke

Racetrack Spectator (uncredited)

Bess Flowers

Racetrack Spectator (uncredited)

Bert Moorhouse

Morgan's Jockey

Frankie Darro

Detective

Pat Flaherty

Racetrack Guard (uncredited)

Frank O'Connor

Party Guest (uncredited)

Carole Landis

Messenger

Si Jenks

Black Singer (uncredited)

Etta Moten

Race Judge

Hooper Atchley

Judge

John Hyams

Singer (uncredited)

Dorothy Dandridge

Judge

Wilbur Mack

Racetrack Spectator (uncredited)

Byron Foulger

Nurse

Mary MacLaren

Doctor

Edward Le Saint

Drunk

Jack Norton

themselves (Groucho,Chico, Harpo)

Marx Brothers