Melvyn Douglas

Jerome 'Jerry' Marvin

Ruth Hussey

Professor Susan Drake

Ellen Drew

Babe Marvin

Charles Coburn

Professor Drake

John Hubbard

Tom Drake

Harvey Stephens

Dr. Cassell

Theresa Harris

Hattie

Hooper Atchley

Ticket Man (uncredited)

Irving Bacon

Doorman (uncredited)

Brooks Benedict

Concert Attendee (uncredited)

George Beranger

Waiter (uncredited)

Betty Blythe

Minor Role (uncredited)

Lloyd Bridges

Taxi Driver (uncredited)

Barbara Brown

Shipboard Passenger (uncredited)

Hobart Cavanaugh

Shipboard Passenger (uncredited)

Grace Darmond

Minor Role (uncredited)

Thornton Edwards

Cuban Driver (uncredited)

Edward Fielding

Dr. Mandel (uncredited)

Martín Garralaga

Cuban Driver (uncredited)

Lawrence Grant

Dr. Holgarth (uncredited)

Chuck Hamilton

Sailor (uncredited)

Sam Harris

Concert Attendee (uncredited)

Arthur Stuart Hull

Shipboard Passenger (uncredited)

Crauford Kent

Dr. Jenkins - Ship's Doctor (uncredited)

George McKay

Steward (uncredited)

Paul McVey

Minor Role (uncredited)

John Merton

Officer (uncredited)

Harold Miller

Shipboard Passenger (uncredited)

Forbes Murray

Minor Role (uncredited)

Addison Richards

Middle-Aged Man in Jerry's Stateroom (uncredited)

Cyril Ring

Shipboard Passenger (uncredited)

Cosmo Sardo

Shipboard Passenger (uncredited)

Larry Steers

Departing Shipboard Passenger (uncredited)

Lloyd Whitlock

Customer (uncredited)

John Holland