Mariclare Costello, Teacher Rosemary On ‘The Waltons’, Dies At 90
Key takeaways
- Hollywood & Entertainment Mariclare Costello, Teacher Rosemary On ‘The Waltons’, Dies At 90By Tim Lammers,
- Costello died on April 17 in Brooklyn, N.Y., her family wrote on Legacy.
- The actress was born Mariclare Catherine Costello on Feb. 3, 1936, in Peoria, Ill.
Hollywood & Entertainment Mariclare Costello, Teacher Rosemary On ‘The Waltons’, Dies At 90By Tim Lammers,
Forbes contributors publish independent expert analyses and insights. I cover Hollywood and entertainment.Follow Author Apr 27, 2026, 12:53pm EDTApr 27, 2026, 02:00pm EDT--:-- / --:--This voice experience is generated by AI. Learn more.This voice experience is generated by AI. Learn more.Mariclare Costello stands with her thumbs in her pockets in a scene from the film 'Let's Scare Jessica to Death', 1971. (Photo by Paramount Pictures/Getty Images)Getty ImagesMariclare Costello, a prolific actress whose credits include The Waltons and Let’s Scare Jessica to Death, has died.
Costello died on April 17 in Brooklyn, N.Y., her family wrote on Legacy. She was 90.