Mariclare Costello, a lifetime member of The Actors Studio who recurred as the schoolteacher Rosemary Hunter on The Waltons and played a hippie vampire in the cult horror film Let’s Scare Jessica to Death, died April 17 in Brooklyn, her family announced. She was 90.
A native of Illinois, Costello was an original member of the Lincoln Center Repertory Company, and she appeared four times on Broadway, including in a 1970 revival of Harvey that starred Jimmy Stewart and Helen Hayes.
In 1974, she portrayed the wife of Martin Sheen’s title character in the Emmy-winning ABC telefilm The Execution of Private Slovik.
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She was married to actor Allan Arbus, who played the psychiatrist Maj. Sidney Freedman on CBS’ M*A*S*H, from 1977 until his death in 2013 at age 95. (His first wife was the photographer Diane Arbus.)
Costello
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