Actor
Mariclare Costello
90 years · Peoria, Illinois, USA · 24 films
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.
Best known for
Indecent Proposal
1993 · David's Mother
On Hoopla
Ordinary People
1980 · Audrey
On Kanopy
The Adventures of Buckaroo Banzai Across the 8th Dimension
1984 · Senator Cunningham
On Philo
Let's Scare Jessica to Death
1971 · Emily
On Hoopla
Nightmares
1983 · Adele Cooney (segment "The Bishop of Battle")
Raid on Entebbe
1976 · Gabrielle Krieger
Filmography 24
Shadow of the Blair Witch
2000 · Kathy Patterson
Indecent Proposal
1993 · David's Mother
On Hoopla
She Said No
1990 · Susan Finn
On Tubi TV
Appearances
1990 · Rose
American Harvest
1987 · Mary Alice Duncan
Heart of a Champion: The Ray Mancini Story
1985 · Ellen Mancini
Victims for Victims: The Theresa Saldana Story
1984 · Jane Bladow
On Philo
The Adventures of Buckaroo Banzai Across the 8th Dimension
1984 · Senator Cunningham
On Philo
Nightmares
1983 · Adele Cooney (segment "The Bishop of Battle")
Skeezer
1982 · Barbara Thompson
Coward of the County
1981 · Emma Spencer
On fuboTV
Ordinary People
1980 · Audrey
On Kanopy
All God's Children
1980 · Winnie Naponic
The Boy Who Drank Too Much
1980 · Louise Carpenter
A Sensitive, Passionate Man
1977 · Pat Morris
On Philo
Raid on Entebbe
1976 · Gabrielle Krieger
Territorial Men
1976 · Julia Baker
On Tubi TV
Conspiracy of Terror
1975 · Mrs. Warnall
After the Fall
1974 · Louise
The Gun
1974 · Beryl Strauss
The Execution of Private Slovik
1974 · Antoinette Slovik
Going Where I've Never Been: The Photography of Diane Arbus
1972 · Herself - Narrator
Let's Scare Jessica to Death
1971 · Emily
On Hoopla
Pound
1970 · Honky Killer's Wife