"Dr. Jekyll believes good and evil exist in everyone and creates a potion that allows his evil side, Mr. Hyde, to come to the fore. He faces horrible consequences when he lets his dark side run amok."
Spencer Tracy
as Dr. Henry 'Harry' Jekyll / Mr. Hyde
Ingrid Bergman
as Ivy Peterson
Lana Turner
as Beatrix 'Bea' Emery
Donald Crisp
as Sir Charles Emery
Ian Hunter
as Dr. John Lanyon
Barton MacLane
as Sam Higgins
C. Aubrey Smith
as The Bishop
Peter Godfrey
as Poole
Sara Allgood
as Mrs. Higgins
Frederick Worlock
as Dr. Heath
William Tannen
as Intern Fenwick
Frances Robinson
as Marcia
Denis Greene
as Freddie
Billy Bevan
as Mr. Weller
Forrester Harvey
as Old Prouty
Lumsden Hare
as Colonel Weymouth
Lawrence Grant
as Dr. Courtland
John Barclay
as Constable
Hillary Brooke
as Mrs. Arnold (uncredited)
Alec Craig
as Tripped Waiter (uncredited)
Brandon Hurst
as Dr. Lanyon's Butler Briggs (uncredited)
Olaf Hytten
as Hobson (uncredited)
Colin Kenny
as Constable (uncredited)
Doris Lloyd
as Mrs. Marley (uncredited)
Aubrey Mather
as Inspector (uncredited)
Al Ferguson
Mary Field
as Wife (uncredited)
Frank Hagney
as Drunk (uncredited)
Bobby Hale
as Cart Driver (uncredited)
Martha Wentworth
as Landlady (uncredited)
Katherine Yorke
as Barmaid (uncredited)
C.M. 'Slats' Wyrick
as Thug (uncredited)
Larry Wheat
as Church Member (uncredited)
Pax Walker
as Minor Role (uncredited)
Venita Vincent
Sailor Vincent
as Brawler (uncredited)
Jacques Vanaire
as French Attendant (uncredited)
Jack Stewart
Jimmy Spencer
as Young Man (uncredited)
Yorke Sherwood
as Chairman (uncredited)
Patsy Shaw
as Specialty Dancer (uncredited)
Clara Reid
as Old Woman in Art Museum (uncredited)
John Power
Gil Perkins
Milton Parsons
as Choir Master (uncredited)
Lionel Pape
as Mr. Marley (uncredited)
Edmund Mortimer
as Reception Guest (uncredited)
Pat Moriarity
Alice Mock
as Soloist in 'See Me Dance the Polka' Number (uncredited)
Cyril McLaglen
Frances MacInerney
as Young Woman (uncredited)
Eric Lonsdale
as Husband (uncredited)
Gwendolyn Logan
as Mrs. Courtland (uncredited)
Susanne Leach
as Dowager in Church (uncredited)
Claude King
as Uncle Geoffrey (uncredited)
P.J. Kelly
Harold Howard
as Blind Man (uncredited)
Winifred Harris
as Mrs. Weymouth (uncredited)
Victor Fleming
Director
Harold F. Kress
Editor
Joseph Ruttenberg
Director of Photography
Cedric Gibbons
Art Direction
Percy Heath
Screenplay
Daniele Amfitheatrof
Original Music Composer
Edwin B. Willis
Set Decoration
Robert Louis Stevenson
Novel
Victor Saville
Producer
Jack Dawn
Makeup Artist
Adrian
Costume Design
John Lee Mahin
Samuel Hoffenstein
Mario Castelnuovo-Tedesco
Franz Waxman
Warren Newcombe
Special Effects
Keith Weeks
Unit Manager