Person
Mariclare Costello
Acting · 1936–2026 · Peoria, Illinois, USA
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.
Known for
Chicago Hope
Mother Mary Catherine
Murder, She Wrote
Cassie Latham Burns
The Waltons
Mrs. Rosemary Fordwick
Hart to Hart
Anita Boyer
Lou Grant
Louise Larsen
The Incredible Hulk
Kay Wallace
Kojak
Diane Gordon
Indecent Proposal
David's Mother
The Fitzpatricks
Maggie Fitzpatrick
The Adventures of Buckaroo Banzai Across the 8th Dimension
Senator Cunningham
Filmography
- 2000Shadow of the Blair WitchKathy Patterson
- 1994Chicago HopeMother Mary Catherine
- 1993Indecent ProposalDavid's Mother
- 1990She Said NoSusan Finn
- 1990AppearancesRose
- 1987American HarvestMary Alice Duncan
- 1985Heart of a Champion: The Ray Mancini StoryEllen Mancini
- 1984Victims for Victims: The Theresa Saldana StoryJane Bladow
- 1984Murder, She WroteCassie Latham Burns
- 1984The Adventures of Buckaroo Banzai Across the 8th DimensionSenator Cunningham
- 1983NightmaresAdele Cooney (segment "The Bishop of Battle")
- 1982SkeezerBarbara Thompson
- 1981Coward of the CountyEmma Spencer
- 1980Ordinary PeopleAudrey
- 1980All God's ChildrenWinnie Naponic
- 1980The Boy Who Drank Too MuchLouise Carpenter
- 1979Hart to HartAnita Boyer
- 1977The Incredible HulkKay Wallace
- 1977Lou GrantLouise Larsen
- 1977The FitzpatricksMaggie Fitzpatrick
- 1977A Sensitive, Passionate ManPat Morris
- 1976Raid on EntebbeGabrielle Krieger
- 1976Territorial MenJulia Baker
- 1975Conspiracy of TerrorMrs. Warnall
- 1974After the FallLouise
- 1974The GunBeryl Strauss
- 1974The Execution of Private SlovikAntoinette Slovik
- 1973KojakDiane Gordon
- 1972Going Where I've Never Been: The Photography of Diane ArbusHerself - Narrator
- 1972The WaltonsMrs. Rosemary Fordwick
- 1971Let's Scare Jessica to DeathEmily
- 1970PoundHonky Killer's Wife
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