Dr. Henry 'Harry' Jekyll / Mr. Hyde
Spencer Tracy
Ivy Peterson
Ingrid Bergman
Intern Fenwick
William Tannen
Marcia
Frances Robinson
Freddie
Denis Greene
Mr. Weller
Billy Bevan
Old Prouty
Forrester Harvey
Colonel Weymouth
Lumsden Hare
Dr. Courtland
Lawrence Grant
Constable
John Barclay
Mrs. Arnold (uncredited)
Hillary Brooke
Tripped Waiter (uncredited)
Alec Craig
Beatrix 'Bea' Emery
Lana Turner
Dr. Lanyon's Butler Briggs (uncredited)
Brandon Hurst
Hobson (uncredited)
Olaf Hytten
Constable (uncredited)
Colin Kenny
Mrs. Marley (uncredited)
Doris Lloyd
Inspector (uncredited)
Aubrey Mather
Al Ferguson
Wife (uncredited)
Mary Field
Drunk (uncredited)
Frank Hagney
Cart Driver (uncredited)
Bobby Hale
Landlady (uncredited)
Martha Wentworth
Sir Charles Emery
Donald Crisp
Dr. John Lanyon
Ian Hunter
Sam Higgins
Barton MacLane
The Bishop
C. Aubrey Smith
Poole
Peter Godfrey
Mrs. Higgins
Sara Allgood
Dr. Heath
Frederick Worlock
Screenplay
John Lee Mahin
Original Music Composer
Franz Waxman
Director
Victor Fleming
Costume Design
Adrian
Makeup Artist
Jack Dawn
Samuel Hoffenstein
Set Decoration
Edwin B. Willis
Novel
Robert Louis Stevenson
Art Direction
Cedric Gibbons
Producer
Victor Saville
Percy Heath
Daniele Amfitheatrof
Director of Photography
Joseph Ruttenberg
Editor
Harold F. Kress
Mario Castelnuovo-Tedesco
Special Effects
Warren Newcombe
Unit Manager
Keith Weeks