Fanatic is a 1965 British horror thriller film directed by Silvio Narizzano for Hammer Films. It stars Tallulah Bankhead, Stefanie Powers, Peter Vaughan, Yootha Joyce, Maurice Kaufmann and Donald Sutherland.

Tallulah Brockman Bankhead was an American actress. Primarily an actress of the stage, Bankhead also appeared in several prominent films including an award-winning performance in Alfred Hitchcock's Lifeboat (1944). She also had a brief but successful career on radio and made appearances on television. In all, Bankhead amassed nearly 300 film, stage, television and radio roles during her career. She was inducted into the American Theater Hall of Fame in 1972 and the Alabama Women's Hall of Fame in 1981.