Dr. Barnaby Fulton

Cary Grant

Mrs. Edwina Fulton

Ginger Rogers

Miss Lois Laurel

Marilyn Monroe

Mr. Oliver Oxley

Charles Coburn

Harvey Entwhistle

Hugh Marlowe

Dr. Jerome Kitzel

Henri Letondal

Dr. Zoldeck

Robert Cornthwaite

Mr. G.J. Culverly

Larry Keating

Dr. Brunner

Douglas Spencer

Mrs. Rhinelander

Esther Dale

Little Indian

George 'Foghorn' Winslow

The Barber (uncredited)

Joseph Mell

Deep-voiced Boy

George Winslow

Mr. Peabody

George Eldredge

Gus (uncredited)

Emmett Lynn

Oxley Receptionist (uncredited)

Marjorie Holliday

Reporter (uncredited)

Harry Carey, Jr.

Man at Pool (uncredited)

Nico Minardos

House Painter (uncredited)

Heinie Conklin

Mrs. Brannigan (uncredited)

Kathleen Freeman

Student (uncredited)

Charlotte Austin

Pickwick Arms Desk Clerk (uncredited)

Olan Soule

Scientist (uncredited)

Harry Bartell

Dowager (uncredited)

Faire Binney

Club Patron (uncredited)

Tex Brodus

Photographer (uncredited)

John McKee

Johnny's Mother (uncredited)

Olive Carey

Scientist (uncredited)

Harry Carter

Girl (uncredited)

Melinda Casey

Bellboy (uncredited)

Bill McLean

Boy (uncredited)

Ronnie Clark

Board Member (uncredited)

Paul Maxey

Board Member (uncredited)

Mack Williams

Policeman (uncredited)

Russ Clark

Board Member (uncredited)

Forbes Murray

Bit Receptionist

Marjorie Halliday

Clothing Store Salesman (uncredited)

Harry Seymour

Boy (uncredited)

Terry Goodman

Cabbie (uncredited)

Dabbs Greer

Narrator (voice) (uncredited)

Howard Hawks

Scientist (uncredited)

Jerry Paris

Club Patron (uncredited)

George Hoagland

(uncredited)

Roger Moore

Laundress (uncredited)

Ruth Warren

Club Patron (uncredited)

Perk Lazelle

Laundress (uncredited)

Isabel Withers

Boy (uncredited)

Rudy Lee

Boy (uncredited)

Louis Lettieri

Boy (uncredited)

Mickey Little

Cop

Ray Montgomery

Boy

Brad Mora

Boy (uncredited)

Jimmy Roebuck

Boy (uncredited)

Brad Morrow

Garage Man (uncredited)

Robert Nichols

Clerk

Mary Field

Joe (uncredited)

Jerry Sheldon

Yale Man (uncredited)

Gil Stratton

Clerk (uncredited)

Maudie Prickett

Photographer

John R. McKee