Mariclare Costello
Known for ActingBorn 1936-02-06 — died 2026-04-17Peoria, Illinois, USA
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
1993 · as David's Mother
The Adventures of Buckaroo Banzai Across the 8th Dimension
1984 · as Senator Cunningham
Ordinary People
1980 · as Audrey
American Harvest
1987 · as Mary Alice Duncan
Nightmares
1983 · as Adele Cooney (segment "The Bishop of Battle")
Raid on Entebbe
1976 · as Gabrielle Krieger
After the Fall
1974 · as Louise
She Said No
1990 · as Susan Finn
Let's Scare Jessica to Death
1971 · as Emily
The Execution of Private Slovik
1974 · as Antoinette Slovik
The Gun
1974 · as Beryl Strauss
Heart of a Champion: The Ray Mancini Story
1985 · as Ellen Mancini
All God's Children
1980 · as Winnie Naponic
A Sensitive, Passionate Man
1977 · as Pat Morris
Coward of the County
1981 · as Emma Spencer
Conspiracy of Terror
1975 · as Mrs. Warnall
Pound
1970 · as Honky Killer's Wife
Shadow of the Blair Witch
2000 · as Kathy Patterson