Mercedes McCambridge (March 16, 1916 – March 2, 2004) was an American actress. She was born to an Irish-American Roman Catholic family. She received an Academy Award for Best Supporting Actress. She got that award for her performance in All the King's Men in 1949. Her other movies included Johnny Guitar and Giant. She began her career in the 1940s performing on radio.
McCambridge was born in Joliet, Illinois. She died of natural causes in San Diego.