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Maria O’Brien, the actress best known for her work on Matlock, has died at the age of 75.
The star and acting coach passed away on February 24, according to reports from Deadline.
Her cause of death has not been disclosed.
Born into a family of performers, she was the daughter of Oscar-winning actor Edmund O’Brien and musical comedy star Olga San Juan.
O’Brien made her film debut in 1975 with Smile, and went on to appear in films including Shell Game (1975), The Choirboys (1977), Prime Time (1977), PSI Factor (1980), and The Incredible Shrinking Woman (1980).
In 1984, she appeared in Protocol, sharing the screen with , , Richard Romanus, and others.
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Maria O’Brien, the actress best known for her work on Matlock, has died at the age of 75; (pictured in 1987)
The star and acting coach passed away on February 24, and her cause of death has not been disclosed; (pictured 1974)
On television, O’Brien appeared in a host of popular shows, including Viva Valdez, The Love Boat, How the West Was Won and The Life and Times of Eddie Roberts.
She also appeared in CHiPs, Quincy, M.E., Magnum, P.I., Good Morning, Miss Bliss, L.A. Law and Matlock.
O'Brien in How the West Was Won in 1979
O’Brien made her film debut in 1975 with Smile
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Maria came from a family devoted to the arts and followed in her father’s footsteps by becoming a passionate advocate for Alzheimer’s awareness.




