 Melvyn DouglasJerome 'Jerry' Marvin | Jerome 'Jerry' Marvin |
 Ruth HusseyProfessor Susan Drake | Professor Susan Drake |
 Ellen DrewBabe Marvin | Babe Marvin |
 Charles CoburnProfessor Drake | Professor Drake |
 John HubbardTom Drake | Tom Drake |
 Harvey StephensDr. Cassell | Dr. Cassell |
 Theresa HarrisHattie | Hattie |
 Hooper AtchleyTicket Man (uncredited) | Ticket Man (uncredited) |
 Irving BaconDoorman (uncredited) | Doorman (uncredited) |
 Brooks BenedictConcert Attendee (uncredited) | Concert Attendee (uncredited) |
 George BerangerWaiter (uncredited) | Waiter (uncredited) |
 Betty BlytheMinor Role (uncredited) | Minor Role (uncredited) |
 Lloyd BridgesTaxi Driver (uncredited) | Taxi Driver (uncredited) |
 Barbara BrownShipboard Passenger (uncredited) | Shipboard Passenger (uncredited) |
 Hobart CavanaughShipboard Passenger (uncredited) | Shipboard Passenger (uncredited) |
 Grace DarmondMinor Role (uncredited) | Minor Role (uncredited) |
| TThornton EdwardsCuban Driver (uncredited) | Cuban Driver (uncredited) |
| BBob EvansBlack Man (uncredited) | Black Man (uncredited) |
 Edward FieldingDr. Mandel (uncredited) | Dr. Mandel (uncredited) |
 Martín GarralagaCuban Driver (uncredited) | Cuban Driver (uncredited) |
 Lawrence GrantDr. Holgarth (uncredited) | Dr. Holgarth (uncredited) |
 Chuck HamiltonSailor (uncredited) | Sailor (uncredited) |
| SSam HarrisConcert Attendee (uncredited) | Concert Attendee (uncredited) |
 Arthur Stuart HullShipboard Passenger (uncredited) | Shipboard Passenger (uncredited) |
 Crauford KentDr. Jenkins - Ship's Doctor (uncredited) | Dr. Jenkins - Ship's Doctor (uncredited) |
| PPaul LopezCuban Official (uncredited) | Cuban Official (uncredited) |
 George McKaySteward (uncredited) | Steward (uncredited) |
 Paul McVeyMinor Role (uncredited) | Minor Role (uncredited) |
 John MertonOfficer (uncredited) | Officer (uncredited) |
 Harold MillerShipboard Passenger (uncredited) | Shipboard Passenger (uncredited) |
