- Groucho Marx
- Attorney Loophole
- Chico Marx
- Antonio
- Harpo Marx
- 'Punchy'
- Kenny Baker
- Jeff Wilson
- Florence Rice
- Julie Randall
- Eve Arden
- Peerless Pauline
- Margaret Dumont
- Mrs. Dukesbury
- Nat Pendleton
- Goliath
- Fritz Feld
- Jardinet
- James Burke
- John Carter
- Jerry Maren
- Little Professor Atom
- Barnett Parker
- Whitcomb
- Mariska Aldrich
- Mannish Woman
- Irving Bacon
- Telegraph Clerk
- Willie Best
- Redcap
- John Binns
- Old Man
- William A. Boardway
- Party Guest
- George Bookasta
- Member of Quartette
- James Carlisle
- Party Guest
- James Conaty
- Party Guest
- Frank Darien
- Telegrapher
- Dudley Dickerson
- Singer / Dancer - 'Swingali' (uncredited)
- Helen Dickson
- Party Guest
- Hazel Dohlman
- Party Guest
- Betsy Gay
- Circus Midget
- Charles Gemora
- Gibraltar the Gorilla
- John George
- Little Man Leaving Diner
- Dick Gordon
- Circus Patron
- Bobbie Hale
- Train Passenger
- Stuart Hall
- Circus Patron
- Harry Hayden
- Conductor
- Shep Houghton
- Circus Patron
- Payne B. Johnson
- Boy at Circus
- Carl M. Leviness
- Club Car Train Passenger
- Robert Locke Lorraine
- Party Guest
- Buck Mack
- Checkers Player
- Murdock MacQuarrie
- Attendant
- The Marx Brothers
- Themselves
- Matt McHugh
- Cabbie
- Charles Meakin
- Party Guest
- Harold Miller
- Circus Patron
- Edmund Mortimer
- Judge Chanock
- Forbes Murray
- Captain
- Frank Orth
- Chef in Diner
- Emory Parnell
- Ringmaster
- Lillian Randolph
- Black Woman - 'Swingali'
- Paul Ravel
- Party Guest
- Larry Steers
- Party Guest
- Charles Sullivan
- Roustabout / Henchman (uncredited)
- Fred Walburn
- Young Boy
- Robert Winkler
- Young Boy
- Katherine Yorke
- Party Guest
