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