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Mariclare Costello: From The Waltons to Horror Films
27 Apr
Summary
- Actress Mariclare Costello died at 90 years old.
- She was known for her role as Rosemary Hunter on The Waltons.
- Costello also starred in the cult horror film 'Let's Scare Jessica to Death'.

Mariclare Costello, a distinguished actress and lifetime member of The Actors Studio, passed away on April 17th at the age of 90 in Brooklyn. She was widely recognized for her portrayal of Rosemary Hunter on the popular television series "The Waltons," appearing in 15 episodes across its first five seasons.
Costello also captivated audiences with her role as a vampire ghost in the 1971 cult horror film "Let's Scare Jessica to Death." Her career extended to Broadway, including a notable revival of "Harvey" with Jimmy Stewart, and television films like "The Execution of Private Slovik."
Born in Peoria, Illinois, Costello was an original member of the Lincoln Center Repertory Company. Beyond her acting, she dedicated many years to teaching and directing theater, notably leading the drama program at St. Paul the Apostle Elementary School and mentoring students at Loyola Marymount University. Her family remembers her as warm, curious, generous, and deeply attentive to the world around her.