The Marx Brothers help young Broadway hopefuls when they get mixed up with gangsters due to a tin of sardines containing Romanoff diamonds.
| Actor | Role |
|---|---|
 Groucho MarxSam Grunion | Sam Grunion |
 Harpo MarxHarpo | Harpo |
 Chico MarxFaustino | Faustino |
 Ilona MasseyMadame Egelichi | Madame Egelichi |
 Vera-EllenMaggie Phillips | Maggie Phillips |
 Marion HuttonBunny Dolan | Bunny Dolan |
 Raymond BurrAlphonse Zoto | Alphonse Zoto |
 Melville CooperThrockmorton | Throckmorton |
 Paul ValentineMike Johnson | Mike Johnson |
 Leon BelascoMr. Lyons | Mr. Lyons |
 Eric BloreMackinaw | Mackinaw |
 Bruce GordonHannibal Zoto | Hannibal Zoto |
 Marilyn MonroeGrunion's Client | Grunion's Client |
 Otto WaldisIvan (uncredited) | Ivan (uncredited) |