1936 - 2026
Mariclare Costello American Actress
11
Rest in Peace Mariclare Costello.
Passed away on 17th April, 2026 aged 90.
Mariclare Costello dating history
Relationships
Mariclare Costello was previously married to Allan Arbus (1977 - 2013).
About
American Actress Mariclare Costello was born Mariclare Catherine Costello on 3rd February, 1936 in Peoria, Illinois, USA and passed away on 17th Apr 2026 Brooklyn, New York City, New York, USA aged 90. She is most remembered for The Waltons. Her zodiac sign is Aquarius.
Mariclare Costello was in 2 on-screen matchups, including Andrew Prine in In the Heat of the Night (1988) and Paul Napier in Little House on the Prairie (1974).
Mariclare Costello is a member of the following lists: American television actors, 1936 births and American actors.
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Relationship Statistics
| Type | Total | Longest | Average | Shortest |
|---|
| Married | 1 |
35 years, 9 months
|
-
|
-
|
|---|
| Total | 1 |
35 years, 9 months
|
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|
-
|
|---|
Details
| First Name |
Mariclare
|
| Middle Name |
Catherine
|
| Last Name |
Arbus
|
| Maiden Name |
Costello
|
| Full Name at Birth |
Mariclare Catherine Costello
|
| Alternative Name |
Mariclare Catherine Costello, Mariclare Costello, Mariclaire Costello, Mary Clare Costello
|
| Birthday |
3rd February, 1936
|
| Birthplace |
Peoria, Illinois, USA
|
| Died |
17th April, 2026
|
| Place of Death |
Brooklyn, New York City, New York, USA
|
| Height |
5' 4" (163 cm)
|
| Build |
Average
|
| Eye Color |
Blue
|
| Hair Color |
Blonde
|
| Zodiac Sign |
Aquarius
|
| Sexuality |
Straight
|
| Ethnicity |
White
|
| Nationality |
American
|
| University |
BA, Clarke College, MFA, Catholic University of America
|
| Occupation Text |
Actress, Acting Professor
|
| Occupation |
Actress
|
| Claim to Fame |
The Waltons
|
| Year(s) Active |
1967–2002, 1967–2002
|
| Talent Agency (e.g. Modelling) |
Sutton-Barth & Vennari (LA)
|
| Official Websites |
www.nndb.com/people/814/000347770/
|
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.
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