Born February 3, in Peoria, IL; married Allan Arbus (an actor); stepchildren: Amy (a photographer), Don (a writer and art director).
Television Appearances; Series:
Rosemary Hunter Fordwick, The Waltons, CBS, 1972–1977.
Julia Bailey, Sara, CBS, 1976.
Maggie Fitzpatrick, The Fitzpatricks, CBS, 1977–1978.
Sister Lillian, Santa Barbara, NBC, 1990.
Television Appearances; Movies:
Antoinette Slovik, The Execution of Private Slovik, NBC, 1974.
Beryl Strauss, The Gun, ABC, 1974.
Mrs. Warnall, Conspiracy of Terror, NBC, 1975.
Gabrielle Krieger, Raid on Entebbe, NBC, 1977.
Pat Morris, A Sensitive, Passionate Man, NBC, 1977.
Winnie Naponic, All God's Children, ABC, 1980.
Emma, Coward of the County, NBC, 1981.
Barbara Thompson, Skeezer, NBC, 1982.
Jane Bladow, Victims for Victims: The Theresa Saldana Story (also known as Victims for Victims), NBC, 1984.
Ellen Mancini, Heart of a Champion: The Ray Mancini Story, CBS, 1985.
Mary Alice Duncan, American Harvest (also known as Race against the Harvest), CBS, 1987.
Double Switch, ABC, 1987.
Rose, Appearances, NBC, 1990.
Susan Finn, She Said No, NBC, 1990.
Television Appearances; Specials:
Louise, After the Fall, NBC, 1974.
Mrs. Carpenter, "The Boy Who Drank Too Much," ABC Afterschool Specials, ABC, 1980.
Kate Cummings, "Juvi" (also known as "Juvenile Hall"), CBS Schoolbreak Specials, CBS, 1987.
Kathy Patterson, Shadow of the Blair Witch, Sci–Fi Channel, 2000.
Television Appearances; Episodic:
"The Attacker," N.Y.P.D., ABC, 1969.
Diane Gordon, "Death Is Not a Passing Grade," Kojak, CBS, 1974.
Enid Feeny, "Baptism of Fire," Amy Prentiss, NBC, 1974.
Emily, "For the Love of Money," Harry O, ABC, 1975.
Ruth, "The Deadlier Species," Barnaby Jones, CBS, 1975.
Maxine Kintner, "Cop," Lou Grant, CBS, 1979.
Mrs. Wallace, "No Escape," The Incredible Hulk, CBS, 1979.
Helen Crane, "Portrait of Love," Little House on the Prairie, NBC, 1980.
Louise Larsen, "Execution," Lou Grant, CBS, 1981.
Anita Boyer, "Deep in the Hart of Dixieland," Hart to Hart, ABC, 1982.
Mrs. Mendenhall, "Secrets," Fame, syndicated, 1984.
Cassie Latham Burns, "Powder Keg," Murder, She Wrote, CBS, 1986.
"Ghost Story," High Tide, syndicated, 1997.
Mother Mary Catherine, "Memento Mori," Chicago Hope, CBS, 1998.
Dr. Singer, "An Impartial Bias," Judging Amy, CBS, 1999.
Mrs. Norris, "Smoke and Mirrors," Providence, NBC, 2002.
Appeared as Darlene Sands, In the Heat of the Night, NBC.
Television Appearances; Pilots:
Denise Peterson, Off Duty, CBS, 1988.
Rosi, The Tiger Makes Out, Columbia, 1967.
Honky killer's wife, Pound, United Artists, 1970.
Emily, Let's Scare Jessica to Death (also known as The Secret beneath the Lake), Paramount, 1971.
Audrey, Ordinary People, Paramount, 1980.
(Scenes deleted) Emma Goldman, Ragtime, Paramount, 1981.
Adele Cooney, "Bishop of Battle," Nightmares, Universal, 1983.
Senator Cunningham, The Adventures of Buckaroo Banzai across the Eighth Dimension (also known as The Adventures of Buckaroo Banzai), Twentieth Century–Fox, 1984.
David's mother, Indecent Proposal, Paramount, 1993.
Sheila Maloney, But for Whom Charlie, ANTA (American National Theatre and Academy) Washington Square Theatre, 1964.
The Changeling, ANTA Washington Square Theatre, 1964.
Louise, After the Fall, ANTA Washington Square Theatre, 1964–1965.
Midwife, Tartuffe, ANTA Washington Square Theatre, 1965.
Danton's Death, Lincoln Center, Vivian Beaumont Theatre, New York City, c. 1965.
Susan, Lovers and Other Strangers, Brooks Atkinson Theatre, New York City, 1968.
Hilde, A Patriot for Me, Imperial Theatre, New York City, 1969.
Nurse Ruth Kelly, Harvey, ANTA Playhouse, New York City, 1970.
Vera Natalia, The Headhunters, Bucks County Playhouse, New Hope, PA, 1971.
Abigail Williams, The Crucible, Burks County Playhouse, 1972.
Cecily Pigeon, The Odd Couple, Bucks County Playhouse, 1972.
The girl, The Orphan, Joseph Papp Public Theatre, New York City, 1973.
Understudy for Sarah Brown, Guys and Dolls (musical), Interact Theatre Company, North Hollywood, CA, 2004.
Our Town, Interact Theatre Company, North Hollywood, CA, 2004.
The Skin of Our Teeth, Loyola Marymount University, Charles H. Strub Memorial Theatre, Los Angeles, 2004.
"Costello, Mariclare." Contemporary Theatre, Film and Television. . Encyclopedia.com. (July 17, 2019). https://www.encyclopedia.com/education/news-wires-white-papers-and-books/costello-mariclare
"Costello, Mariclare." Contemporary Theatre, Film and Television. . Retrieved July 17, 2019 from Encyclopedia.com: https://www.encyclopedia.com/education/news-wires-white-papers-and-books/costello-mariclare
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