When an aspiring barber becomes inadvertently involved in the theft of a valuable diamond, necessity forces him to masquerade as a 12 year-old child - with humorous consequences.
| Actor | Role |
|---|---|
 Dean MartinBob Miles | Bob Miles |
 Jerry LewisWilbur Hoolick | Wilbur Hoolick |
 Diana LynnNancy Collins | Nancy Collins |
 Nina FochGretchen Brendan | Gretchen Brendan |
 Raymond BurrNoonan | Noonan |
 Mitzi McCallSkeets Powell | Skeets Powell |
 Veda Ann BorgMrs. Noonan | Mrs. Noonan |
| MMargery MaudeMrs. Ella Brendan | Mrs. Ella Brendan |
 Romo VincentTicket Agent | Ticket Agent |
 Nancy KulpMarty's Mother | Marty's Mother |
 Milton FromeLieutenant O'Malley | Lieutenant O'Malley |
| WWhitey HauptMichael Brendan (uncredited) | Michael Brendan (uncredited) |
 Tommy IvoMarty (uncredited) | Marty (uncredited) |
 Hans ConriedFrancois (uncredited) | Francois (uncredited) |
| PPeggy MoffittAgnes (uncredited) | Agnes (uncredited) |