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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.