Mariclare Costello
Acting
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Acting Credits
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
Filmography
Shadow of the Blair Witch
2000
as Kathy Patterson
Chicago Hope
1994
as Mother Mary Catherine
Indecent Proposal
1993
as David's Mother
Appearances
1990
as Rose
She Said No
1990
as Susan Finn
American Harvest
1987
as Mary Alice Duncan
Heart of a Champion: The Ray Mancini Story
1985
as Ellen Mancini
The Adventures of Buckaroo Banzai Across the 8th Dimension
1984
as Senator Cunningham
Victims for Victims: The Theresa Saldana Story
1984
as Jane Bladow
Murder, She Wrote
1984
as Cassie Latham Burns
Nightmares
1983
as Adele Cooney (segment "The Bishop of Battle")
Skeezer
1982
as Barbara Thompson
Coward of the County
1981
as Emma Spencer
Ordinary People
1980
as Audrey
The Boy Who Drank Too Much
1980
as Louise Carpenter
All God's Children
1980
as Winnie Naponic
Hart to Hart
1979
as Anita Boyer
A Sensitive, Passionate Man
1977
as Pat Morris
The Fitzpatricks
1977
as Maggie Fitzpatrick
Lou Grant
1977
as Louise Larsen
The Incredible Hulk
1977
as Kay Wallace
Territorial Men
1976
as Julia Baker
Raid on Entebbe
1976
as Gabrielle Krieger
Conspiracy of Terror
1975
as Mrs. Warnall
The Execution of Private Slovik
1974
as Antoinette Slovik
The Gun
1974
as Beryl Strauss
After the Fall
1974
as Louise
Kojak
1973
as Diane Gordon
Going Where I've Never Been: The Photography of Diane Arbus
1972
as Herself - Narrator
The Waltons
1972
as Mrs. Rosemary Fordwick
The Waltons
1972
as Miss Rosemary Hunter
The Waltons
1972
as Mrs. Rosemary Fordwick (archive footage)
Let's Scare Jessica to Death
1971
as Emily
Pound
1970
as Honky Killer's Wife