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While still a college student, Mercedes McCambridge began performing on radio, and soon became one of the busiest and most respected radio actresses of her time. In the late '40s she appeared successfully in several Broadway productions, leading to an invitation from Hollywood. For her screen debut in All the King's Men (1949), she won a "Best Supporting Actress" Oscar. Despite her early success, she went on to appear in films only intermittently, usually in intense, volatile roles. For her work in Giant (1956), she received a second Oscar nomination. McCambridge was never seen onscreen in what was perhaps her best-known performance: that of the demon's voice in the huge hit The Exorcist (1975). From 1950-62 she was married to writer-director Fletcher Markle. McCambridge authored two autobiographies, The Two of Us (1960) and A Quality of Mercy (1981). McCambridge died of natural caues at 87-years-old in 2004.