 Dean MartinRay Hunter | Ray Hunter |
 Anna Maria AlberghettiNina Martelli | Nina Martelli |
 Eva BartokMaria Martelli | Maria Martelli |
 Walter SlezakPapa Martelli | Papa Martelli |
 Dewey MartinMike Clark | Mike Clark |
 Paul HenreidAnton | Anton |
 Evelyn VardenCountess Alzani | Countess Alzani |
 John ArcherBob Dudley | Bob Dudley |
 Dean JonesDan | Dan |
 Jules MunshinArthur | Arthur |
 Marcel DalioVittorio Cisini | Vittorio Cisini |
 Lisa MontellDiana Martelli | Diana Martelli |
 Lisa GayeAna Martelli | Ana Martelli |
| SStephen DunneTom Crandall | Tom Crandall |
 Monique van VoorenGirl on Main Title | Girl on Main Title |
| RRobert ArgentReporter (uncredited) | Reporter (uncredited) |
| FFrank ArnoldReporter (uncredited) | Reporter (uncredited) |
| JJeanne BairdChicago Operator (uncredited) | Chicago Operator (uncredited) |
| BBrandon BeachNightclub Patron (uncredited) | Nightclub Patron (uncredited) |
| PPaul BradleyBenefit Guest (uncredited) | Benefit Guest (uncredited) |
 George CalligaParty Guest (uncredited) | Party Guest (uncredited) |
 Lilyan ChauvinReporter (uncredited) | Reporter (uncredited) |
 Jack ChefeParty Guest (uncredited) | Party Guest (uncredited) |
| FFranco CorsaroHeadwaiter (uncredited) | Headwaiter (uncredited) |
| AAudrey Conti(uncredited) | (uncredited) |
| HHenry Dar BoggiaAssistant Hotel Manager (uncredited) | Assistant Hotel Manager (uncredited) |
| AAngelo De MeoPoliceman (uncredited) | Policeman (uncredited) |
 Valentin de VargasReporter (uncredited) | Reporter (uncredited) |
 Don DillawayReporter (uncredited) | Reporter (uncredited) |
 Franklyn FarnumParty Guest (uncredited) | Party Guest (uncredited) |
