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 as Constable (uncredited)

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 as Minor Role (uncredited)

Sailor Vincent as Brawler (uncredited)

Jacques Vanaire as French Attendant (uncredited)

Jack Stewart as Constable (uncredited)

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 as Constable (uncredited)

Gil Perkins as Brawler (uncredited)

Milton Parsons as Choir Master (uncredited)

Lionel Pape as Mr. Marley (uncredited)

Edmund Mortimer as Reception Guest (uncredited)

Pat Moriarity as Drunk (uncredited)

Alice Mock as Soloist in 'See Me Dance the Polka' Number (uncredited)

Cyril McLaglen as Drunk (uncredited)

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 as Minor Role (uncredited)

Harold Howard as Blind Man (uncredited)

Winifred Harris as Mrs. Weymouth (uncredited)

Stuart Hall as Minor Role (uncredited)

Eldon Gorst as Messenger (uncredited)

Douglas Gordon as Cockney (uncredited)

Gwen Gaze as Mrs. French (uncredited)

Mel S. Forrester as Minor Role (uncredited)

David Dunbar as Footman (uncredited)

Herbert Clifton as Hostler (uncredited)

Rita Carlyle as Minor Role (uncredited)

Ted Billings as Bar Patron (uncredited)

Lydia Bilbrook as Lady Copewell (uncredited)

Vangie Beilby as Spinster in Art Museum (uncredited)

Jimmy Aubrey as Hanger-On (uncredited)

Rudolph Andrean as Art Student (uncredited)