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Mariclare Costello, Teacher Rosemary On ‘The Waltons’, Dies At 90

She was best known for her five-season role on The Waltons and appeared in nine Broadway productions, her family said.

  • Mariclare Catherine Costello, a versatile actress known for her recurring role as schoolteacher Rosemary Hunter on The Waltons, died in Brooklyn on April 17 at age 90, her family announced.
  • Born in Peoria, Illinois, in 1936, Costello began her career as an original member of the Lincoln Center Repertory Company in 1964, later making her Broadway debut in The Country Wife.
  • She gained prominence as a vampire ghost in the 1971 horror film Let's Scare Jessica to Death and starred alongside Martin Sheen in the 1974 television drama The Execution of Private Slovik.
  • Married to actor Allan Arbus until his death in 2013, Costello was remembered by her family for productions that were "works of extraordinary care and beauty."
  • In her later years, Costello directed productions at Loyola High School and Homeboy Industries; she is survived by her daughter, stage director Arin Arbus, and her granddaughter Bird.
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Lean Left

They knew millions of viewers as Rosemary Hunter from the cult series "The Waltons" – now Mariclare Costello died at the age of 90. The actress, who once appeared before President Kennedy, leaves an impressive legacy on stage and screen.

Lean Left

Mariclare Costello made a name for herself at the theater and in front of the camera. Now the actress died at the age of 90.

Lean Right

Mariclare Costello, known for bringing Rosemary Hunter Fordwick to life in the American dramatic series 'The Waltons' died last April 17 in Brooklyn at the age of 90. Lifetime member of the prestigious The Actors Studio, Costello leaves behind a career ranging from Broadway theater to some of the titles most remembered by Spanish viewers.Although her name may not be familiar to the public, her face is tied to television nostalgia.In Spain, Coste…

·Spain
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TMZ broke the news in Los Angeles, United States on Monday, April 27, 2026.
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