Acting
Mariclare Costello
1936-02-06 · Peoria, Illinois, USA
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
Indecent Proposal
Ordinary People
The Adventures of Buckaroo Banzai Across the 8th Dimension
The Incredible Hulk
Murder, She Wrote
Let's Scare Jessica to Death
Kojak
Hart to Hart
The Waltons
Nightmares
Chicago Hope
Raid on Entebbe
Lou Grant
Shadow of the Blair Witch
The Execution of Private Slovik
Coward of the County
Movie credits · 24
Shadow of the Blair Witch
Indecent Proposal
She Said No
Appearances
American Harvest
Heart of a Champion: The Ray Mancini Story
Victims for Victims: The Theresa Saldana Story
The Adventures of Buckaroo Banzai Across the 8th Dimension
Nightmares
Skeezer
Coward of the County
Ordinary People
All God's Children
The Boy Who Drank Too Much
A Sensitive, Passionate Man
Raid on Entebbe
Territorial Men
Conspiracy of Terror
After the Fall
The Gun
The Execution of Private Slovik
Going Where I've Never Been: The Photography of Diane Arbus
Let's Scare Jessica to Death
Pound
TV credits · 8
Movie & TV metadata from TMDB. This product uses the TMDB API but is not endorsed or certified by TMDB.