About Mercedes McCambridge
Carlotta Mercedes Agnes McCambridge was an American actress of radio, stage, film, and television. Orson Welles called her "the world's greatest living radio actress". She won an Academy Award for Best Supporting Actress for her screen debut in All the King's Men (1949) and was nominated in the same category for Giant (1956). She voiced the majority of dialogue for demon Pazuzu in The Exorcist (1973). In an episode of Bewitched titled "Darrin Gone! and Forgotten," which aired on ABC in October 1968, McCambridge played a powerful witch named Carlotta (McCambridge's real first name), a frenemy of Endora. McCambridge won the 1949 Academy Award for Best Supporting Actress for the role, while the film won Best Picture for that year. McCambridge also won the Golden Globe Awards for Best Supporting Actress and New Star of the Year – Actress for her performance.
Biography source: Wikipedia. The profile adds birthday-specific historical context from the Celebs Birthday Today editorial database.