Mariclare Costello
Acting
1936-02-06 · 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.
Filmography(34)
movieShadow of the Blair Witch
as Kathy Patterson · 2000 · 5.7
tvChicago Hope
as Mother Mary Catherine · 1994 · 7.2
movieIndecent Proposal
as David's Mother · 1993 · 6.4
movieShe Said No
as Susan Finn · 1990 · 7.7
movieAppearances
as Rose · 1990 · 10.0
movieAmerican Harvest
as Mary Alice Duncan · 1987 · 9.0
movieHeart of a Champion: The Ray Mancini Story
as Ellen Mancini · 1985 · 6.0
movieVictims for Victims: The Theresa Saldana Story
as Jane Bladow · 1984 · 7.5
tvMurder, She Wrote
as Cassie Latham Burns · 1984 · 7.5
movieThe Adventures of Buckaroo Banzai Across the 8th Dimension
as Senator Cunningham · 1984 · 6.0
movieNightmares
as Adele Cooney (segment "The Bishop of Battle") · 1983 · 5.7
movieSkeezer
as Barbara Thompson · 1982 · 10.0
movieCoward of the County
as Emma Spencer · 1981 · 6.5
movieOrdinary People
as Audrey · 1980 · 7.4
movieAll God's Children
as Winnie Naponic · 1980 · 6.5
movieThe Boy Who Drank Too Much
as Louise Carpenter · 1980 · 4.7
tvHart to Hart
as Anita Boyer · 1979 · 6.9
tvThe Incredible Hulk
as Kay Wallace · 1977 · 7.2
tvLou Grant
as Louise Larsen · 1977 · 7.3
tvThe Fitzpatricks
as Maggie Fitzpatrick · 1977 · 7.5
movieA Sensitive, Passionate Man
as Pat Morris · 1977 · 5.5
movieRaid on Entebbe
as Gabrielle Krieger · 1976 · 6.0
movieTerritorial Men
as Julia Baker · 1976 · 0.0
movieConspiracy of Terror
as Mrs. Warnall · 1975 · 7.0