Acting

Mariclare Costello

Born 1936-02-06 · Peoria, Illinois, USA

Died 2026-04-17

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.

Credits

Newest first

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