Mariclare Costello is a retired American television, stage, and movie actress. She is a lifetime member of The Actors Studio.[1] 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.
Costello portrayed a hippie-vampire in the 1971 cult horror film Let's Scare Jessica to Death.[2]
She was married to actor Allan Arbus until his death in 2013. The couple had one child.[3]
After her acting career, she was an acting professor at Loyola Marymount University in Los Angeles.[4]
| Year | Title | Role | Notes |
|---|---|---|---|
| 1967 | The Tiger Makes Out | Rosi | |
| 1969 | N.Y.P.D. | Eloise Hendrix | S2.E16 - "The Attacker" |
| 1970 | Pound | Honky Killer's Wife | |
| 1970 | Storefront Lawyers | Nancy Collins | S1.E3 - "Murph Collins vs. Tomorrow" |
| 1971 | Let's Scare Jessica to Death | Emily/Abigail | |
| 1972 | Ironside | Mary Ellen Wells | S6.E2 - "The Savage Sentry" |
| 1972-77 | The Waltons | Rosemary Hunter/Fordwick | 15 episodes |
| 1974 | Kojak | Diane Gordon | S1.E13 - "Death Is Not a Passing Grade" |
| 1974 | After the Fall | Louise | TV film based on Arthur Miller's play by the same name |
| 1974 | The Execution of Private Slovik | Private Slovik's wife Antoinette | NBC TV film |
| 1974 | The Gun | Beryl Strauss | ABC Movie of the Week |
| 1975 | Barnaby Jones | Ruth Granger | S3.E21 - "The Deadlier Species" |
| 1975 | Harry O | Emily Weston | S1.E15 - "For the Love of Money" |
| 1977 | This Is the Life | Ann | Episode: "Stranger at the Door" |
| 1977 | Raid on Entebbe | Gabrielle Krieger | |
| 1977-78 | The Fitzpatricks | Maggie Fitzpatrick | 13 episodes - regular cast |
| 1979 | The Incredible Hulk | Kay Wallace | S2.E18 - "No Escape" |
| 1979-81 | Lou Grant | Maxine Kintner/Louise Larsen | 2 episodes |
| 1980 | Ordinary People | Audrey Butler | |
| 1981 | Ragtime | Emma Goldman | (workprint edit only) |
| 1981 | Coward of the County | Emma | Television Movie |
| 1982 | Hart to Hart | Anita Boyer | S3.E18 - "Deep in the Hart of Dixieland" |
| 1982 | Fame | Mrs. Mendenhall | S3.E9 - "Secrets" |
| 1983 | Nightmares | Adele Cooney | (segment "The Bishop of Battle") |
| 1984 | The Adventures of Buckaroo Banzai Across the 8th Dimension | Senator Cunningham | |
| 1984 | Victims for Victims: The Theresa Saldana Story | Jane Bladow | NBC TV film |
| 1985 | Heart of a Champion: The Ray Mancini Story | Ellen Mancini | CBS TV film |
| 1986 | Murder, She Wrote | Cassie Latham Burns | S2.E15 - "Powder Keg" |
| 1990 | In the Heat of the Night | Darlene | S3.E14 - "December Days" |
| 1990 | Santa Barbara | Sister Lillian | 2 episodes |
| 1993 | Indecent Proposal | David's Mother | |
| 1997 | High Tide | S3.E21 - "Ghost Story" | |
| 1998 | Chicago Hope | Mother Mary Catherine | S4.E13 - "Memento Mori" |
| 1999 | Judging Amy | Dr. Singer | S1.E7 - "An Impartial Bias" |
| 2002 | Providence | Helen Norris | S4.E21 - "Smoke and Mirrors" |
| 2011 | Assisted Loving (video short) | Pearl |
| International | |
|---|---|
| National | |
| Other | |
