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)

Bob Evans

Black Man (uncredited)

Edward Fielding

Dr. Mandel (uncredited)

Martín Garralaga

Cuban Driver (uncredited)