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.
Movie Appearances
The Adventures of Buckaroo Banzai Across the 8th Dimension
as Senator Cunningham
1984
Let's Scare Jessica to Death
as Emily
1971
Territorial Men
as Julia Baker
1976
Ordinary People
as Audrey
1980
The Execution of Private Slovik
as Antoinette Slovik
1974
The Boy Who Drank Too Much
as Louise Carpenter
1980
Coward of the County
as Emma Spencer
1981
Heart of a Champion: The Ray Mancini Story
as Ellen Mancini
1985
The Gun
as Beryl Strauss
1974
Appearances
as Rose
1990
Victims for Victims: The Theresa Saldana Story
as Jane Bladow
1984
Skeezer
as Barbara Thompson
1982
A Sensitive, Passionate Man
as Pat Morris
1977
She Said No
as Susan Finn
1990
Shadow of the Blair Witch
as Kathy Patterson
2000
Going Where I've Never Been: The Photography of Diane Arbus
as Herself - Narrator
1972
Pound
as Honky Killer's Wife
1970
All God's Children
as Winnie Naponic
1980
After the Fall
as Louise
1974
Nightmares
as Adele Cooney (segment "The Bishop of Battle")
1983
TV Appearances
Chicago Hope
as Mother Mary Catherine
1994
The Fitzpatricks
as Maggie Fitzpatrick
1977
Lou Grant
as Louise Larsen
1977
Kojak
as Diane Gordon
1973
Hart to Hart
as Anita Boyer
1979
The Incredible Hulk
as Kay Wallace
1977
Murder, She Wrote
as Cassie Latham Burns
1984
The Waltons
as Mrs. Rosemary Fordwick
1972
The Waltons
as Miss Rosemary Hunter
1972
The Waltons
as Mrs. Rosemary Fordwick (archive footage)
1972