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Mariclare Costello

Cast & creator

Mariclare Costello

1936-02-06 (died at 90) Peoria, Illinois, USAIMDb

Best known for Chicago Hope, Murder, She Wrote, The Waltons

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.

Also known as: Mariclare Catherine Costello

Movies

24

film credits

Series

10

television credits

Career

34

1970–2000 · acting roles

Credit score

7.0

average across scored titles

Signature credits

Known for

Ordered by popularity

Chicago Hope

Chicago Hope

Mother Mary Catherine · 1994

Murder, She Wrote

Murder, She Wrote

Cassie Latham Burns · 1984

The Waltons

The Waltons

Mrs. Rosemary Fordwick · 1972

The Waltons

The Waltons

Miss Rosemary Hunter · 1972

The Waltons

The Waltons

Mrs. Rosemary Fordwick (archive footage) · 1972

Across film & television

Filmography (34)

Search filmography

Showing 34 of 34 credits

Chicago Hope

Chicago Hope

Mother Mary Catherine

Murder, She Wrote

Murder, She Wrote

Cassie Latham Burns

The Waltons

The Waltons

Mrs. Rosemary Fordwick

The Waltons

The Waltons

Miss Rosemary Hunter

The Waltons

The Waltons

Mrs. Rosemary Fordwick (archive footage)

Hart to Hart

Hart to Hart

Anita Boyer

The Incredible Hulk

The Incredible Hulk

Kay Wallace

Lou Grant

Lou Grant

Louise Larsen

Kojak

Kojak

Diane Gordon

Indecent Proposal

Indecent Proposal

David's Mother

The Fitzpatricks

The Fitzpatricks

Maggie Fitzpatrick

Ordinary People

Ordinary People

Audrey

The Adventures of Buckaroo Banzai Across the 8th Dimension

The Adventures of Buckaroo Banzai Across the 8th Dimension

Senator Cunningham

Nightmares

Nightmares

Adele Cooney (segment "The Bishop of Battle")

Raid on Entebbe

Raid on Entebbe

Gabrielle Krieger

American Harvest

American Harvest

Mary Alice Duncan

The Execution of Private Slovik

The Execution of Private Slovik

Antoinette Slovik

Let's Scare Jessica to Death

Let's Scare Jessica to Death

Emily

Heart of a Champion: The Ray Mancini Story

Heart of a Champion: The Ray Mancini Story

Ellen Mancini

Coward of the County

Coward of the County

Emma Spencer

The Boy Who Drank Too Much

The Boy Who Drank Too Much

Louise Carpenter

A Sensitive, Passionate Man

A Sensitive, Passionate Man

Pat Morris

All God's Children

All God's Children

Winnie Naponic

Shadow of the Blair Witch

Shadow of the Blair Witch

Kathy Patterson

She Said No

She Said No

Susan Finn

Victims for Victims: The Theresa Saldana Story

Victims for Victims: The Theresa Saldana Story

Jane Bladow

After the Fall

After the Fall

Louise

Appearances

Appearances

Rose

Conspiracy of Terror

Conspiracy of Terror

Mrs. Warnall

The Gun

The Gun

Beryl Strauss

Pound

Pound

Honky Killer's Wife

Territorial Men

Territorial Men

Julia Baker

Going Where I've Never Been: The Photography of Diane Arbus

Going Where I've Never Been: The Photography of Diane Arbus

Herself - Narrator

Skeezer

Skeezer

Barbara Thompson