Mariclare Costello
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.
32 acting credits
Acting · 32
Murder, She Wrote
1984
Chicago Hope
1994
The Waltons
1972
Hart to Hart
1979
The Incredible Hulk
1977
Kojak
1973
Lou Grant
1977
Indecent Proposal
1993
The Adventures of Buckaroo Banzai Across the 8th Dimension
1984
The Fitzpatricks
1977
Ordinary People
1980
Raid on Entebbe
1976
The Boy Who Drank Too Much
1980
Nightmares
1983
Pound
1970
The Execution of Private Slovik
1974
Heart of a Champion: The Ray Mancini Story
1985
Let's Scare Jessica to Death
1971
American Harvest
1987
Appearances
1990
A Sensitive, Passionate Man
1977
Victims for Victims: The Theresa Saldana Story
1984
Coward of the County
1981
Territorial Men
1976
Skeezer
1982
All God's Children
1980
Shadow of the Blair Witch
2000
The Gun
1974
Conspiracy of Terror
1975
After the Fall
1974
She Said No
1990
Going Where I've Never Been: The Photography of Diane Arbus
1972