Person file · Acting
Mariclare Costello
Born 1936-02-06Peoria, 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.
Screen work
Movies & roles
Shadow of the Blair WitchKathy PattersonIndecent ProposalDavid's MotherShe Said NoSusan FinnAppearancesRoseAmerican HarvestMary Alice DuncanHeart of a Champion: The Ray Mancini StoryEllen ManciniVictims for Victims: The Theresa Saldana StoryJane BladowThe Adventures of Buckaroo Banzai Across the 8th DimensionSenator CunninghamNightmaresAdele Cooney (segment "The Bishop of Battle")SkeezerBarbara ThompsonCoward of the CountyEmma SpencerOrdinary PeopleAudreyAll God's ChildrenWinnie NaponicThe Boy Who Drank Too MuchLouise CarpenterA Sensitive, Passionate ManPat MorrisRaid on EntebbeGabrielle KriegerTerritorial MenJulia BakerConspiracy of TerrorMrs. WarnallAfter the FallLouiseThe GunBeryl StraussThe Execution of Private SlovikAntoinette SlovikGoing Where I've Never Been: The Photography of Diane ArbusHerself - NarratorLet's Scare Jessica to DeathEmilyPoundHonky Killer's Wife