The Witches is a 1966 British horror film directed by Cyril Frankel and starring Joan Fontaine, Alec McCowen, Kay Walsh, Ann Bell, Ingrid Boulting and Gwen Ffrangcon-Davies. Made by Hammer Films, it was adapted by Nigel Kneale from the 1960 novel The Devil's Own by Norah Lofts.

Joan de Beauvoir de Havilland, known professionally as Joan Fontaine, was an English-American actress who is best known for her starring roles in Hollywood films during the Golden Age of Hollywood. Fontaine appeared in more than 45 films in a career that spanned five decades. She was the younger sister of actress Olivia de Havilland. Their rivalry was well-documented in the media at the height of Fontaine's career.