
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.

Murder, She Wrote
TV • 1984

The Love Boat
TV • 1977

Magnum, P.I.
TV • 1980

Matlock
TV • 1986

Beyond Belief: Fact or Fiction
TV • 1997

CHiPs
TV • 1977

Suddenly Susan
TV • 1996

Smile
MOVIE • 1975

Howard
MOVIE • 2018

Protocol
MOVIE • 1984

The Choirboys
MOVIE • 1977

In a Stranger's Hand
MOVIE • 1991

The Incredible Shrinking Woman
MOVIE • 1981

Promised a Miracle
MOVIE • 1988

In the Best Interest of the Child
MOVIE • 1990

In Sickness and in Health
MOVIE • 1992

Good Luck
MOVIE • 1997

Shell Game
MOVIE • 1975