Cary Grant

Barnaby Fulton

Ginger Rogers

Edwina Fulton

Charles Coburn

Oliver Oxley

Marilyn Monroe

Lois Laurel

Hugh Marlowe

Hank Entwhistle

Henri Letondal

Jerome Kitzel

Robert Cornthwaite

Dr. Zoldeck

Larry Keating

G.J. Culverly

Douglas Spencer

Dr. Brunner

Esther Dale

Mrs. Rhinelander

George Winslow

Little Indian

Harry Carey, Jr.

Reporter (uncredited)

Nico Minardos

Man at Pool (uncredited)

Charlotte Austin

Student (uncredited)

Harry Bartell

Scientist (uncredited)

Faire Binney

Dowager (uncredited)

Harry Carter

Scientist (uncredited)

Melinda Casey

Girl (uncredited)

Heinie Conklin

House Painter (uncredited)

George Eldredge

Mr. Peabody (uncredited)

Kathleen Freeman

Mrs. Brannigan - Neighbor (uncredited)

Dabbs Greer

Cabbie (uncredited)

Howard Hawks

Man in Opening (voice) (uncredited)

Rudy Lee

Boy (uncredited)

Emmett Lynn

Gus (uncredited)

Paul Maxey

Board Member (uncredited)

John McKee

Photographer (uncredited)

Joseph Mell

Barber (uncredited)

Ray Montgomery

Policeman (uncredited)

Brad Morrow

Boy (uncredited)

Forbes Murray

Board Member (uncredited)

Robert Nichols

Garage Man (uncredited)

Jerry Paris

Scientist (uncredited)

Maudie Prickett

Clerk (uncredited)

Olan Soule

Pickwick Arms Clerk (uncredited)

Gil Stratton

Yale Man (uncredited)

Ruth Warren

Laundress (uncredited)

Mack Williams

Board Member (uncredited)