Born 1936 (age 90) · Peoria, Illinois, USA
Appears in 32 titles

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
6.4
Indecent Proposal
1993
as David's Mother
Ordinary People
7.4
Ordinary People
1980
as Audrey
The Adventures of Buckaroo Banzai Across the 8th Dimension
Let's Scare Jessica to Death
6.2
Let's Scare Jessica to Death
1971
as Emily
Nightmares
5.7
Nightmares
1983
as Adele Cooney (segment "The Bishop of Battle")
Raid on Entebbe
6.1
Raid on Entebbe
1976
as Gabrielle Krieger
Shadow of the Blair Witch
5.7
Shadow of the Blair Witch
2000
as Kathy Patterson
The Execution of Private Slovik
7.4
The Execution of Private Slovik
1974
as Antoinette Slovik
Coward of the County
6.5
Coward of the County
1981
as Emma Spencer
Victims for Victims: The Theresa Saldana Story
Pound
4.8
Pound
1970
as Honky Killer's Wife
Heart of a Champion: The Ray Mancini Story
The Boy Who Drank Too Much
4.7
The Boy Who Drank Too Much
1980
as Louise Carpenter
The Gun
8.7
The Gun
1974
as Beryl Strauss
She Said No
7.7
She Said No
1990
as Susan Finn
Conspiracy of Terror
7.0
Conspiracy of Terror
1975
as Mrs. Warnall
A Sensitive, Passionate Man
5.5
A Sensitive, Passionate Man
1977
as Pat Morris
All God's Children
6.5
All God's Children
1980
as Winnie Naponic
Appearances
10.0
Appearances
1990
as Rose
Skeezer
10.0
Skeezer
1982
as Barbara Thompson