Mariclare Costello
Birthday: 1936-02-06 | Place of Birth: Peoria, Illinois, USAMariclare 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.
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Known For
Acting
Year
Title
Role
2000
Shadow of the Blair Witch
as Kathy Patterson
1990
She Said No
as Susan Finn
1987
American Harvest
as Mary Alice Duncan
1985
Heart of a Champion: The Ray Mancini Story
as Ellen Mancini
1984
Victims for Victims: The Theresa Saldana Story
as Jane Bladow
1982
Skeezer
as Barbara Thompson
1981
Coward of the County
as Emma Spencer
1980
The Boy Who Drank Too Much
as Louise Carpenter
1977
The Fitzpatricks
as Maggie Fitzpatrick
1977
A Sensitive, Passionate Man
as Pat Morris
1975
Conspiracy of Terror
as Mrs. Warnall
1974
The Execution of Private Slovik
as Antoinette Slovik
1974
After the Fall
as Louise
1971
Let's Scare Jessica to Death
as Emily
1970
Pound
as Honky Killer's Wife
