Mariclare Costello

Biography

Mariclare Catherine Costello (February 3, 1936 – April 17, 2026) was an American actress. She was a lifetime member of The Actors Studio. Costello's most notable role was that of Rosemary Hunter Fordwick on the television series The Waltons, from 1972 to 1977. In 1977, after her role on The Waltons, she played matriarch Maggie Fitzpatrick on the short-lived drama show The Fitzpatricks.

Known For

Indecent Proposal

as David's Mother

Ordinary People

as Audrey

The Incredible Hulk

as Kay Wallace

The Adventures of Buckaroo Banzai Across the 8th Dimension

as Senator Cunningham

Murder, She Wrote

as Cassie Latham Burns

Let's Scare Jessica to Death

as Emily

Kojak

as Diane Gordon

Hart to Hart

as Anita Boyer

The Waltons

as Mrs. Rosemary Fordwick

The Waltons

as Miss Rosemary Hunter