Mariclare Costello
Acting
Born: 1936-02-06 in Peoria, Illinois, USA
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
Murder, She Wrote
Cassie Latham Burns
Chicago Hope
Mother Mary Catherine
The Waltons
Mrs. Rosemary Fordwick
The Waltons
Miss Rosemary Hunter
The Waltons
Mrs. Rosemary Fordwick (archive footage)
The Incredible Hulk
Kay Wallace
Hart to Hart
Anita Boyer
Lou Grant
Louise Larsen
Kojak
Diane Gordon
Indecent Proposal
David's Mother
Ordinary People
Audrey
The Adventures of Buckaroo Banzai Across the 8th Dimension
Senator Cunningham
Nightmares
Adele Cooney (segment "The Bishop of Battle")
The Fitzpatricks
Maggie Fitzpatrick
Raid on Entebbe
Gabrielle Krieger
Let's Scare Jessica to Death
Emily
American Harvest
Mary Alice Duncan
The Execution of Private Slovik
Antoinette Slovik
She Said No
Susan Finn
Heart of a Champion: The Ray Mancini Story
Ellen Mancini
After the Fall
Louise
Coward of the County
Emma Spencer
Victims for Victims: The Theresa Saldana Story
Jane Bladow
The Gun
Beryl Strauss
All God's Children
Winnie Naponic
Pound
Honky Killer's Wife
Territorial Men
Julia Baker
The Boy Who Drank Too Much
Louise Carpenter
A Sensitive, Passionate Man
Pat Morris
Conspiracy of Terror
Mrs. Warnall
Shadow of the Blair Witch
Kathy Patterson
Skeezer
Barbara Thompson
Appearances
Rose
Going Where I've Never Been: The Photography of Diane Arbus
Herself - Narrator