 Groucho MarxAttorney J. Cheever Loophole | Attorney J. Cheever Loophole |
 Chico MarxAntonio Pirelli | Antonio Pirelli |
 Harpo Marx'Punchy' | 'Punchy' |
 Kenny BakerJeff Wilson | Jeff Wilson |
 Florence RiceJulie Randall | Julie Randall |
 Eve ArdenPeerless Pauline | Peerless Pauline |
 Margaret DumontMrs. Suzanna Dukesbury | Mrs. Suzanna Dukesbury |
 Nat PendletonGoliath | Goliath |
 Fritz FeldJardinet | Jardinet |
 James BurkeJohn Carter | John Carter |
 Jerry MarenLittle Professor Atom (as Jerry Marenghi) | Little Professor Atom (as Jerry Marenghi) |
 Barnett ParkerWhitcomb | Whitcomb |
 Irving BaconTelegraph Clerk (uncredited) | Telegraph Clerk (uncredited) |
 Willie BestRedcap (uncredited) | Redcap (uncredited) |
 Frank OrthChef in Diner (uncredited) | Chef in Diner (uncredited) |
| JJohn BinnsOld Man (uncredited) | Old Man (uncredited) |
| HHenry BlairUndetermined Role (uncredited) | Undetermined Role (uncredited) |
| GGeorge BookastaMember of Quarttete (uncredited) | Member of Quarttete (uncredited) |
| JJames ConatyParty Guest (uncredited) | Party Guest (uncredited) |
 Frank DarienTelegrapher (uncredited) | Telegrapher (uncredited) |
 Dudley DickersonSinger / Dancer - 'Swingali' (uncredited) | Singer / Dancer - 'Swingali' (uncredited) |
 Betsy GayCircus Midget (uncredited) | Circus Midget (uncredited) |
 Charles GemoraGibraltar (uncredited) | Gibraltar (uncredited) |
 John GeorgeMan Leaving Diner (uncredited) | Man Leaving Diner (uncredited) |
| BBobby HaleTrain Passenger (uncredited) | Train Passenger (uncredited) |
 Harry HaydenConductor (uncredited) | Conductor (uncredited) |
 Shep HoughtonCircus Patron (uncredited) | Circus Patron (uncredited) |
| PPayne B. JohnsonBoy at Circus (uncredited) | Boy at Circus (uncredited) |
 Carl M. LevinessClub Car Train Passenger (uncredited) | Club Car Train Passenger (uncredited) |
| BBuck MackCheckers Player (uncredited) | Checkers Player (uncredited) |
