Maria O'Brien
Acting
Maria O'Brien (August 14, 1950 – February 24, 2026) was an American actress and acting coach. She was the daughter of actors Edmond O'Brien and Olga San Juan, and sister of voice actor Brendan O'Brien. She was best known as a character actress, but she also had a recurring role on a few television series, such as Ave 43 and The Life and Times of Eddie Roberts. She was also an acting coach on soap operas, such as Days of Our Lives, Sunset Beach, and Passions.
Known For

Murder, She Wrote
1984 · tv

The Love Boat
1977 · tv

Magnum, P.I.
1980 · tv

Beyond Belief: Fact or Fiction
1997 · tv

Matlock
1986 · tv

CHiPs
1977 · tv

Suddenly Susan
1996 · tv

Howard
2018 · movie

Smile
1975 · movie

The Choirboys
1977 · movie

Protocol
1984 · movie

The Incredible Shrinking Woman
1981 · movie

In a Stranger's Hand
1991 · movie

Promised a Miracle
1988 · movie

Good Luck
1997 · movie

In the Best Interest of the Child
1990 · movie

In Sickness and in Health
1992 · movie

PSI Factor
1980 · movie

Your Mother Wears Combat Boots
1989 · movie

Shell Game
1975 · movie

Dead on Arrival
2018 · movie