The Exorcist Voice of the Demon 1973. Birthplace: Not Available. Alas, Mercedes McCambridge was not seen in public since this devastating personal tragedy; her last film appearance had been in 1983's Echoes, which featured such screen veterans as Ruth Roman, Gale Sondergaard, and Mike Kellin. … Mercedes McCambridge. Mercedes McCambridge Ranked In Chronological Order With Ultimate Movie Rankings Score (1 to 5 UMR Tickets) *Best combo of box office, reviews and awards. Movie (Year) Rating. Mercedes McCambridge provided the voice of the demon in 1973’s The Exorcist. Highest Rated: 96% Touch of Evil (1958) Lowest Rated: 0% A Farewell To Arms (1957) Birthday: Mar 16, 1916. Year. Like A Crow On A June Bug 1972. Charlie's Angels Norma 1 Episode (1976) Thieves Street Lady 1977.