LOS ANGELES: Patricia Arquette has won the Academy Award for best supporting actress for "Boyhood."
Arquette plays the mother of Ellar Coltrane's Mason in Richard Linklater's sweeping look at a boy's life, filmed over 12 years.
It was the first Oscar for Arquette. She also won the Golden Globe in January.
The other nominees were Laura Dern, "Wild"; Keira Knightley, "The Imitation Game"; Emma Stone, "Birdman"; and Meryl Streep, "Into the Woods."
The 87th Academy Awards are airing live on ABC from the Dolby Theatre in Los Angeles, hosted by Neil Patrick Harris.