Actress Mercedes McCambridge, who won an Oscar for the 1949 film "All the King's Men" and later provided the raspy voice of the demon-possessed girl in "The Exorcist," has died. She was 87.

Because of her great vocal skills, McCambridge was hired to portray The Demon in William Friedkin's 1973 smash hit "The Exorcist." After weeks of what she called the hardest work she had done for a film, she had been promised prominent mention in the credits.

But when she attended the preview, her name was missing. As she left the theater in tears, Friedkin tried to explain that there had been no time to insert her credit. The Screen Actors Guild intervened and forced her inclusion in the credits.

Source: Yahoo [1]