Paul Massie

as Dr. Jekyll / Mr. Hyde

Dawn Addams

as Kitty Jekyll

Christopher Lee

as Paul Allen

David Kossoff

as Dr. Littauer

Norma Marla

as Maria

Francis de Wolff

as Inspector

Joy Webster

as Jenny

Magda Miller

as Sphinx Girl (uncredited)

Oliver Reed

as Nightclub Bouncer (uncredited)

Helen Goss

as Nanny (uncredited)

Arthur Lovegrove

as Cabby (uncredited)

Walter Gotell

as Heverton - Second Gambler (uncredited)

Percy Cartwright

as Coroner (uncredited)

John Bonney

as Renfrew (uncredited)

Denis Cleary

as Waiter (uncredited)

Doug Robinson

as Boxer (uncredited)

Fred Stone

as Cabinet Minister (uncredited)

Mackenzie Ward

as Business Man (uncredited)

Rodney Burke

as Young Blood (uncredited)