Mercedes McCambridge started her acting career on radio drama shows in the 1940s. At the same time, she appeared in some Broadway plays.
Ms. McCambridge was very adept at creating different voices, and it was this talent that allowed her to portray various characters on radio shows, sometimes even playing different roles on the same episode of a show.
Her movie career started in 1949, when she appeared in "All the King's Men" with Broderick Crawford, and she won the Academy Award for Best Supporting Actress. She continued to act in many other notable movies, including "Johnny Guitar" (1954) and "Giant" (1956).
In 1973, Ms. McCambridge was heard in "The Exorcist", as the demonic voice of the possessed character 'Regan', played by Linda Blair. She did not initially receive screen credit as promised, and she had to take action against the film's director William Friedkin and the studio, Warner Brothers, to assure she was properly credited.
In 1981 I sent Ms. McCambridge this photo, and she returned it within two weeks.