A Day at the Races

Doctor Hugo Hackenbush, Tony, and Stuffy try and save Judy's sanitarium by winning a big race with a finicky horse owned by Judy's boyfriend Gil. There are a few problems. Hackenbush, who was recently put in charge of the sanitarium, isn't really a doctor, he's a veterinarian.

• 
  Sam Wood
• 
  Robert A. Golden

• 
  Groucho Marx
  Dr. Hugo Z. Hackenbush
• 
  Chico Marx
  Tony
• 
  Harpo Marx
  Stuffy
• 
  Allan Jones
  Gil Stewart
• 
  Maureen O'Sullivan
  Judy Standish
• 
  Margaret Dumont
  Emily Upjohn
• 
  Sig Ruman
  Dr. Leopold X. Steinberg
• 
  Leonard Ceeley
  Whitmore
• 
  Douglass Dumbrille
  Morgan
• 
  Esther Muir
  'Flo' Marlowe
• 
  Robert Middlemass
  Sheriff
• 
  Vivien Fay
  Specialty Dancer
• 
  Ivie Anderson
  Specialty Singer
• 
  Gino Corrado
  Man Boarding Bus (uncredited)
• 
  Bess Flowers
  Racetrack Spectator (uncredited)
• 
  Bert Moorhouse
  Racetrack Spectator (uncredited)
• 
  Frank O'Connor
  Racetrack Guard (uncredited)
• 
  Carole Landis
  Party Guest (uncredited)
• 
  Etta Moten
  Black Singer (uncredited)
• 
  Dorothy Dandridge
  Singer (uncredited)