Acting
Mariclare Costello
1936 · Peoria, Illinois, USA
24 films
Bio
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.
Filmography
Indecent Proposal
David's Mother
Ordinary People
Audrey
Nightmares
Adele Cooney (segment "The Bishop of Battle")
The Adventures of Buckaroo Banzai Across the 8th Dimension
Senator Cunningham
American Harvest
Mary Alice Duncan
Let's Scare Jessica to Death
Emily
Raid on Entebbe
Gabrielle Krieger
She Said No
Susan Finn
The Execution of Private Slovik
Antoinette Slovik
Coward of the County
Emma Spencer
Heart of a Champion: The Ray Mancini Story
Ellen Mancini
The Boy Who Drank Too Much
Louise Carpenter