6.4
Movie
Acting
Mariclare Costello
- Born
- Died
- (aged 90)
- Birthplace
- Peoria, Illinois, USA
- Credits
- 32 titles
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.
Signature work
Known For
6.4
Movie
7.5
Movie
Ordinary People
6.0
Movie
The Adventures of Buckaroo Banzai Across the 8th Dimension
7.2
TV
The Incredible Hulk
7.5
TV
Murder, She Wrote
6.2
Movie
Let's Scare Jessica to Death
7.3
TV
Kojak
6.9
TV
Hart to Hart
7.1
TV
The Waltons
5.9
Movie
Nightmares
7.2
TV
Chicago Hope
6.0
Movie
Raid on Entebbe
7.4
TV
Lou Grant
5.5
Movie
Shadow of the Blair Witch
7.4
Movie
The Execution of Private Slovik
6.5
Movie
Coward of the County
6.7
Movie
Victims for Victims: The Theresa Saldana Story
4.8
Movie
Pound
Acting credits 32
| Year | Title | Role |
|---|---|---|
| 2000 | Shadow of the Blair Witch Film | Kathy Patterson |
| 1994 | Chicago Hope TV | Mother Mary Catherine (1 ep) |
| 1993 | Indecent Proposal Film | David's Mother |
| 1990 | She Said No Film | Susan Finn |
| 1990 | Appearances Film | Rose |
| 1987 | American Harvest Film | Mary Alice Duncan |
| 1985 | Heart of a Champion: The Ray Mancini Story Film | Ellen Mancini |
| 1984 | Victims for Victims: The Theresa Saldana Story Film | Jane Bladow |
| 1984 | Murder, She Wrote TV | Cassie Latham Burns (1 ep) |
| 1984 | The Adventures of Buckaroo Banzai Across the 8th Dimension Film | Senator Cunningham |
| 1983 | Nightmares Film | Adele Cooney (segment "The Bishop of Battle") |
| 1982 | Skeezer Film | Barbara Thompson |
| 1981 | Coward of the County Film | Emma Spencer |
| 1980 | Ordinary People Film | Audrey |
| 1980 | All God's Children Film | Winnie Naponic |
| 1980 | The Boy Who Drank Too Much Film | Louise Carpenter |
| 1979 | Hart to Hart TV | Anita Boyer (1 ep) |
| 1977 | The Incredible Hulk TV | Kay Wallace (1 ep) |
| 1977 | Lou Grant TV | Louise Larsen (1 ep) |
| 1977 | The Fitzpatricks TV | Maggie Fitzpatrick (13 ep) |
| 1977 | A Sensitive, Passionate Man Film | Pat Morris |
| 1976 | Raid on Entebbe Film | Gabrielle Krieger |
| 1976 | Territorial Men Film | Julia Baker |
| 1975 | Conspiracy of Terror Film | Mrs. Warnall |
| 1974 | After the Fall Film | Louise |
| 1974 | The Gun Film | Beryl Strauss |
| 1974 | The Execution of Private Slovik Film | Antoinette Slovik |
| 1973 | Kojak TV | Diane Gordon (1 ep) |
| 1972 | Going Where I've Never Been: The Photography of Diane Arbus Film | Herself - Narrator |
| 1972 | The Waltons TV | Mrs. Rosemary Fordwick, Miss Rosemary Hunter, Mrs. Rosemary Fordwick (archive footage) (4 ep) |
| 1971 | Let's Scare Jessica to Death Film | Emily |
| 1970 | Pound Film | Honky Killer's Wife |