Mariclare Costello
Acting·February 6, 1936·† April 17, 2026 — 90 years old·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.
Known For
Indecent Proposal
1993·6.4
Ordinary People
1980·7.5
The Incredible Hulk
1977·7.2
The Adventures of Buckaroo Banzai Across the 8th Dimension
1984·6.0
Murder, She Wrote
1984·7.5
Let's Scare Jessica to Death
1971·6.2
Kojak
1973·7.2
Hart to Hart
1979·6.9
The Waltons
1972·7.2
Nightmares
1983·5.7
Chicago Hope
1994·7.2
Raid on Entebbe
1976·6.0
Filmography · 32
2000Shadow of the Blair WitchKathy Patterson1994Chicago HopeTVMother Mary Catherine1993Indecent ProposalDavid's Mother1990She Said NoSusan Finn1990AppearancesRose1987American HarvestMary Alice Duncan1985Heart of a Champion: The Ray Mancini StoryEllen Mancini1984Victims for Victims: The Theresa Saldana StoryJane Bladow1984Murder, She WroteTVCassie Latham Burns1984The Adventures of Buckaroo Banzai Across the 8th DimensionSenator Cunningham1983NightmaresAdele Cooney (segment "The Bishop of Battle")1982SkeezerBarbara Thompson1981Coward of the CountyEmma Spencer1980Ordinary PeopleAudrey1980All God's ChildrenWinnie Naponic1980The Boy Who Drank Too MuchLouise Carpenter1979Hart to HartTVAnita Boyer1977The Incredible HulkTVKay Wallace1977Lou GrantTVLouise Larsen1977The FitzpatricksTVMaggie Fitzpatrick1977A Sensitive, Passionate ManPat Morris1976Raid on EntebbeGabrielle Krieger1976Territorial MenJulia Baker1975Conspiracy of TerrorMrs. Warnall1974After the FallLouise1974The GunBeryl Strauss1974The Execution of Private SlovikAntoinette Slovik1973KojakTVDiane Gordon1972Going Where I've Never Been: The Photography of Diane ArbusHerself - Narrator1972The WaltonsTVMrs. Rosemary Fordwick · Miss Rosemary Hunter · Mrs. Rosemary Fordwick (archive footage)1971Let's Scare Jessica to DeathEmily1970PoundHonky Killer's Wife