Mariclare Costello — Marquee

Mariclare Costello

Acting · 1936–2026 · 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

Let's Scare Jessica to Death

6.2

Let's Scare Jessica to Death

1971 · Emily

The Incredible Hulk

7.2

The Incredible Hulk

1977 · Series · Kay Wallace

Murder, She Wrote

7.5

Murder, She Wrote

1984 · Series · Cassie Latham Burns

Shadow of the Blair Witch

5.7

Shadow of the Blair Witch

2000 · Kathy Patterson

The Execution of Private Slovik

7.4

The Execution of Private Slovik

1974 · Antoinette Slovik

Kojak

7.2

Kojak

1973 · Series · Diane Gordon

Hart to Hart

6.8

Hart to Hart

1979 · Series · Anita Boyer

The Waltons

7.2

The Waltons

1972 · Series · Mrs. Rosemary Fordwick / Miss Rosemary Hunter / Mrs. Rosemary Fordwick (archive footage)

Indecent Proposal

6.4

Indecent Proposal

1993 · David's Mother

Chicago Hope

7.2

Chicago Hope

1994 · Series · Mother Mary Catherine

Coward of the County

6.5

Coward of the County

1981 · Emma Spencer

Ordinary People

7.4

Ordinary People

1980 · Audrey

All acting credits31

Shadow of the Blair Witch

5.7

Shadow of the Blair Witch

2000 · Kathy Patterson

Chicago Hope

7.2

Chicago Hope

1994 · Series · Mother Mary Catherine

Indecent Proposal

6.4

Indecent Proposal

1993 · David's Mother

She Said No

7.7

She Said No

1990 · Susan Finn

Appearances

10.0

Appearances

1990 · Rose

American Harvest

9.0

American Harvest

1987 · Mary Alice Duncan

Heart of a Champion: The Ray Mancini Story

6.0

Heart of a Champion: The Ray Mancini Story

1985 · Ellen Mancini

Murder, She Wrote

7.5

Murder, She Wrote

1984 · Series · Cassie Latham Burns

The Adventures of Buckaroo Banzai Across the 8th Dimension

6.0

The Adventures of Buckaroo Banzai Across the 8th Dimension

1984 · Senator Cunningham

Victims for Victims: The Theresa Saldana Story

7.5

Victims for Victims: The Theresa Saldana Story

1984 · Jane Bladow

Nightmares

5.7

Nightmares

1983 · Adele Cooney (segment "The Bishop of Battle")

Skeezer

10.0

Skeezer

1982 · Barbara Thompson

Coward of the County

6.5

Coward of the County

1981 · Emma Spencer

Ordinary People

7.4

Ordinary People

1980 · Audrey

The Boy Who Drank Too Much

4.7

The Boy Who Drank Too Much

1980 · Louise Carpenter

All God's Children

6.5

All God's Children

1980 · Winnie Naponic

Hart to Hart

6.8

Hart to Hart

1979 · Series · Anita Boyer

Lou Grant

7.3

Lou Grant

1977 · Series · Louise Larsen