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