Best Supporting Actress Patricia Arquette
And the winner for Best Supporting Actress is Patricia Arquette for "Boyhood."

The Oscars 2015 Best Supporting Actress may not have been one of the hotter contested awards of the season, but it's anyone's race come the big night. The five nominees for the Academy Award were Meryl Streep for "Into the Woods," Keira Knightley for "The Imitation Game," Patricia Arquette for "Boyhood," Emma Stone for "Birdman," and Laura Dern for "Wild."

Going into the Academy Awards this year, the Arquette had won the Golden Globe, SAG, BAFTA, and many more awards for her performance, making the veteran actress the clear favorite on Oscar night. Emma Stone was the dark horse in the race, earning rave reviews for her performance as a troubled daughter opposite Michael Keaton in "Birdman," but ultimately Arquette's career-defining role won out.

Arquette was nominated for her role in Richard Linklater's "Boyhood," a somewhat experimental film that was shot over the course of 12 years. The film fictitiously chronicled the childhood and adolescence of a young boy growing up in Texas, Arquette playing the brave and sometimes troubled mother. It was the first Oscar nomination for Arquette and first win.