Known For
Acting
Known Credits
34
Gender
Female
Birthday
February 6, 1936 (90 years old)
Place of Birth
Peoria, Illinois, USA
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.
| 2000 | Shadow of the Blair Witchas Kathy Patterson | |
| 1994 | Chicago Hopeas Mother Mary Catherine | |
| 1993 | Indecent Proposalas David's Mother | |
| 1990 | She Said Noas Susan Finn | |
| 1990 | Appearancesas Rose | |
| 1987 | American Harvestas Mary Alice Duncan | |
| 1985 | Heart of a Champion: The Ray Mancini Storyas Ellen Mancini | |
| 1984 | Victims for Victims: The Theresa Saldana Storyas Jane Bladow | |
| 1984 | Murder, She Wroteas Cassie Latham Burns | |
| 1984 | The Adventures of Buckaroo Banzai Across the 8th Dimensionas Senator Cunningham | |
| 1983 | Nightmaresas Adele Cooney (segment "The Bishop of Battle") | |
| 1982 | Skeezeras Barbara Thompson | |
| 1981 | Coward of the Countyas Emma Spencer | |
| 1980 | Ordinary Peopleas Audrey | |
| 1980 | All God's Childrenas Winnie Naponic | |
| 1980 | The Boy Who Drank Too Muchas Louise Carpenter | |
| 1979 | Hart to Hartas Anita Boyer | |
| 1977 | The Incredible Hulkas Kay Wallace | |
| 1977 | Lou Grantas Louise Larsen | |
| 1977 | The Fitzpatricksas Maggie Fitzpatrick | |
| 1977 | A Sensitive, Passionate Manas Pat Morris | |
| 1976 | Raid on Entebbeas Gabrielle Krieger | |
| 1976 | Territorial Menas Julia Baker | |
| 1975 | Conspiracy of Terroras Mrs. Warnall | |
| 1974 | After the Fallas Louise | |
| 1974 | The Gunas Beryl Strauss | |
| 1974 | The Execution of Private Slovikas Antoinette Slovik | |
| 1973 | Kojakas Diane Gordon | |
| 1972 | Going Where I've Never Been: The Photography of Diane Arbusas Herself - Narrator | |
| 1972 | The Waltonsas Miss Rosemary Hunter | |
| 1972 | The Waltonsas Mrs. Rosemary Fordwick | |
| 1972 | The Waltonsas Mrs. Rosemary Fordwick (archive footage) | |
| 1971 | Let's Scare Jessica to Deathas Emily | |
| 1970 | Poundas Honky Killer's Wife |
