Mariclare Costello
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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
Credits
Indecent Proposal (1993)
as David's Mother
Ordinary People (1980)
as Audrey
The Adventures of Buckaroo Banzai Across the 8th Dimension (1984)
as Senator Cunningham
Nightmares (1983)
as Adele Cooney (segment "The Bishop of Battle")
American Harvest (1987)
as Mary Alice Duncan
Let's Scare Jessica to Death (1971)
as Emily
Raid on Entebbe (1976)
as Gabrielle Krieger
She Said No (1990)
as Susan Finn
The Execution of Private Slovik (1974)
as Antoinette Slovik
The Boy Who Drank Too Much (1980)
as Louise Carpenter
Coward of the County (1981)
as Emma Spencer
Heart of a Champion: The Ray Mancini Story (1985)
as Ellen Mancini
All God's Children (1980)
as Winnie Naponic
Victims for Victims: The Theresa Saldana Story (1984)
as Jane Bladow
A Sensitive, Passionate Man (1977)
as Pat Morris
Shadow of the Blair Witch (2000)
as Kathy Patterson
After the Fall (1974)
as Louise
Pound (1970)
as Honky Killer's Wife
Going Where I've Never Been: The Photography of Diane Arbus (1972)
as Herself - Narrator
Skeezer (1982)
as Barbara Thompson
Territorial Men (1976)
as Julia Baker
The Gun (1974)
as Beryl Strauss
Appearances (1990)
as Rose
Conspiracy of Terror (1975)
as Mrs. Warnall