Mariclare Costello
Acting
Born February 6, 1936 · 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 · 32 titles
Chicago Hope
Murder, She Wrote
The Waltons
Hart to Hart
Lou Grant
The Incredible Hulk
Kojak
Indecent Proposal
The Fitzpatricks
The Adventures of Buckaroo Banzai Across the 8th Dimension
Ordinary People
Raid on Entebbe
American Harvest
Nightmares
Let's Scare Jessica to Death
She Said No
Coward of the County
The Execution of Private Slovik
The Boy Who Drank Too Much
A Sensitive, Passionate Man
Pound
The Gun
Victims for Victims: The Theresa Saldana Story
Shadow of the Blair Witch
All God's Children
Heart of a Champion: The Ray Mancini Story
Appearances
Conspiracy of Terror
After the Fall
Territorial Men
Skeezer
Going Where I've Never Been: The Photography of Diane Arbus