 Kim NovakLylah Clare / Elsa Brinkmann / Elsa Campbell | Lylah Clare / Elsa Brinkmann / Elsa Campbell |
 Peter FinchLewis Zarken / Louie Flack | Lewis Zarken / Louie Flack |
 Ernest BorgnineBarney Sheean | Barney Sheean |
 Milton SelzerBart Langner | Bart Langner |
 Rossella FalkRossella | Rossella |
 Gabriele TintiPaolo | Paolo |
 Valentina CorteseCountess Bozo Bedoni | Countess Bozo Bedoni |
| JJean CarrollBecky Langner | Becky Langner |
 Michael MurphyMark Peter Sheean | Mark Peter Sheean |
 Coral BrowneMolly Luther | Molly Luther |
 Lee MeriwetherYoung Girl | Young Girl |
 Robert EllensteinMike | Mike |
 Ellen CorbyScript Girl | Script Girl |
 George KennedyMatt Burke | Matt Burke |
 Dick MillerReporter at Press Party | Reporter at Press Party |
 Al BainCrew Member | Crew Member |
 Tom PalmerPress Party Guest | Press Party Guest |
 William BeckleyZarkan | Zarkan |
| JJan PetersProp Man | Prop Man |
 Queenie SmithHairdresser | Hairdresser |
 John AlvinAccountant (uncredited) | Accountant (uncredited) |
 Ernest AndersonHot Dog Man (uncredited) | Hot Dog Man (uncredited) |
 Noble 'Kid' ChissellStagehand (uncredited) | Stagehand (uncredited) |
| GGene ChronopoulosReporter (uncredited) | Reporter (uncredited) |
 Robert CornthwaiteStudio Photo Archivist (uncredited) | Studio Photo Archivist (uncredited) |
 Billy CurtisClown (uncredited) | Clown (uncredited) |
| DDuke FishmanCrew Member (uncredited) | Crew Member (uncredited) |
 Rex HolmanYoung Man (uncredited) | Young Man (uncredited) |
| JJohn IndrisanoStudio Grip (uncredited) | Studio Grip (uncredited) |
 Kenner G. KempBrothel Patron in Film (uncredited) | Brothel Patron in Film (uncredited) |
