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