By Anderson 
Mariclare Costello is a name that resonates in the world of classic American television, particularly for her remarkable roles in iconic TV shows and films during the 1970s and 1980s. Her career, spanning over three decades, has left a significant mark on the industry. In this article, we delve into her life, career, notable roles, and more, exploring everything from her early life to her contributions to television and film, along with her impact on popular culture.
Quick Facts: Mariclare Costello
| Category | Details |
|---|---|
| Full Name | Mariclare Costello |
| Date of Birth | February 3, 1936 |
| Place of Birth | Peoria, Illinois, USA |
| Age | 90 years old (as of 2026) |
| Profession | Actress, Acting Professor |
| Notable TV Roles | The Waltons (Rosemary Hunter Fordwick), Little House on the Prairie (Helen Crane), The Fitzpatricks (Maggie Fitzpatrick) |
| Notable Film Roles | Let’s Scare Jessica to Death (1971), Ordinary People (1980), The Adventures of Buckaroo Banzai Across the 8th Dimension (1984) |
| Spouse | Allan Arbus (married 1977 – his death in 2013) |
| Children | 1 child |
| Education | Acting training, Lifetime Member of The Actors Studio |
| Career Span | 1960s–2002 (acting), ongoing as acting professor in later years |
| Legacy | Renowned for her roles in family-oriented dramas and her contribution to the education of new actors |
| Current Status | Retired from acting, active in teaching at Loyola Marymount University (until retirement) |
Early Life and Background
Mariclare Costello was born on February 3, 1936, in Peoria, Illinois, USA. Raised in the Midwest, Costello showed an early interest in the arts, and her passion for acting led her to pursue training at a young age. After her education, she moved to Los Angeles to kickstart her career in entertainment. Costello would go on to gain recognition not only for her acting skills but also for her profound commitment to theater and acting education, eventually becoming a professor at Loyola Marymount University in California. She was also a lifetime member of The Actors Studio, an achievement that demonstrated her deep involvement in the craft of acting. These foundations shaped the way she approached her roles, blending depth with authenticity in each of her performances.
Rise to Fame in Television
Mariclare Costello’s early career saw her making appearances in various television series, but it was her role on The Waltons (1972-1977) that truly solidified her place in the hearts of television audiences. On the beloved family drama, Costello played Rosemary Hunter Fordwick, a schoolteacher who married Reverend Matthew Fordwick, played by John Ritter. Her portrayal of Rosemary, a warm-hearted yet strong character, was one of the many standout performances that contributed to the show’s immense popularity during the 1970s. The Waltons remains one of the most iconic family dramas, and Costello’s role as a key member of the Walton family made her a household name.
Although her role on The Waltons was a significant part of her career, Mariclare Costello also made several guest appearances on other notable television series of the time, including Little House on the Prairie, where she portrayed Helen Crane in one of the episodes. Even though her time on Little House was brief, it further cemented her presence in the realm of classic TV dramas that continue to resonate with audiences today.
Television Appearances Beyond The Waltons
In addition to her success on The Waltons and Little House on the Prairie, Costello appeared in numerous other television shows, leaving an indelible mark on the small screen. She starred in the short-lived drama series The Fitzpatricks (1977-1978), where she portrayed Maggie Fitzpatrick, the matriarch of the family. The series may not have achieved the same level of long-term success as some of her other projects, but it added to her growing television credits.
Mariclare Costello also appeared in guest spots on shows like Chicago Hope, Judging Amy, and In the Heat of the Night, showcasing her versatility across a wide range of genres. These roles demonstrated her ability to move seamlessly between drama, crime series, and medical shows, further establishing her as a dependable and talented actress.
Film Career and Notable Roles
Mariclare Costello’s career extended beyond television to the big screen, where she demonstrated her versatility as an actress in a variety of film roles. One of her earliest film roles came in 1971’s Let’s Scare Jessica to Death, a cult horror classic in which she played Emily/Abigail, a mysterious character who becomes part of the eerie events surrounding the lead character, Jessica. This role earned her recognition in the horror genre and opened the door for more opportunities in films.
Another notable film role came in 1980’s Ordinary People, a critically acclaimed drama directed by Robert Redford. In this Oscar-winning film, Costello played Audrey, one of the supporting characters in the story of a family grappling with grief and emotional turmoil. Her ability to portray a complex character in such an emotionally charged story added to her reputation as a talented actress capable of handling a variety of roles.
Costello’s filmography also includes The Adventures of Buckaroo Banzai Across the 8th Dimension (1984), where she appeared in a supporting role as Senator Cunningham, and Indecent Proposal (1993), where she played David’s mother. These films further showcased her ability to adapt to different genres, including science fiction and drama, contributing to her reputation as a versatile character actress who could handle both big-budget films and smaller, independent projects.
Mariclare Costello’s Net Worth
While there isn’t an official, widely publicized net worth for Mariclare Costello, it’s clear that her extensive career in both television and film would have provided her with significant financial success. Though many actors of her era may not have been as financially transparent as today’s stars, Costello’s consistent work throughout the 1970s, 1980s, and into the early 2000s suggests she had a stable and successful career. Additionally, her later work as an acting professor likely added another layer of financial stability to her life, as many university positions offer competitive salaries and benefits.
However, like many actors from her generation, Costello was not part of the new wave of celebrity-driven income generation (e.g., social media deals, reality shows, etc.), so most of her wealth would have been earned from steady roles on television and in film. As of now, her financial details are largely private, and there is no verified public record of her exact net worth.
Mariclare Costello’s Impact on TV and Film
Mariclare Costello’s legacy is firmly rooted in the role she played in defining family-oriented television during the 1970s and 1980s. Her portrayal of strong, compassionate female characters on shows like The Waltons and Little House on the Prairie contributed to the lasting popularity of these shows, which continue to be cherished by audiences even decades later. Her ability to bring depth and sincerity to her roles helped elevate the storytelling of these beloved series, making her a respected figure in the television world.
Her versatility as an actress, demonstrated through her diverse roles across different genres, proved that she was not limited to one type of character. From horror films to heartfelt dramas, Costello was able to showcase her range, earning the respect of her peers and the affection of audiences.
The Later Years: Teaching and Private Life
After retiring from acting, Mariclare Costello transitioned to teaching, taking on a role as an acting professor at Loyola Marymount University in Los Angeles, California. This shift allowed her to pass on her knowledge and experience to a new generation of actors, further cementing her legacy in the world of entertainment. Teaching also allowed her to stay connected to the industry she loved, while also maintaining a quieter, more private lifestyle.
Though Costello has remained relatively out of the spotlight in recent years, her contributions to the entertainment industry continue to be remembered fondly. She has earned a place among the stars of classic American television and film, and her impact on the genre remains significant.
Mariclare Costello Today
As of 2026, Mariclare Costello is 90 years old, and while she no longer pursues acting in films or television, her past work continues to be celebrated. Little is known about her day-to-day life today, but it is clear that her work has left an indelible mark on the entertainment industry. Costello’s contributions as an actress and educator ensure that her legacy will continue to inspire future generations of performers.
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Conclusion
Mariclare Costello’s career spanned several decades, making her a beloved figure in both television and film. From her iconic role on The Waltons to her performances in films like Ordinary People and The Adventures of Buckaroo Banzai, Costello showcased an incredible range of talent. Her impact on the television world, especially in the 1970s and 1980s, remains undeniable, and her later work as an acting professor ensured that her knowledge and passion for the craft were passed down to future generations. While she may not be in the public eye today, her legacy as a talented actress and educator lives on in the hearts of those who continue to enjoy her work.