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Birdman, Alejandro G Inarritu's surreal comedy about an aging superstar, claimed the best picture Oscar besides best director and original screenplay wins at the 87th Oscars that saw an appeal from winners for equal rights.
The film, which clipped Richard Linklater's Boyhood in a neck-and-neck fight for the top award, also walked away with best cinematography gong.
British actor Eddie Redmayne won the best actor Oscar for his convincing portrayal of famed astrophysicist Stephen Hawking as a talented young student grappling with a progressive motor neuron disease in The Theory of Everything.
Julianne Moore won a long overdue actress in a leading role Oscar for her poignant portrayal of a mother and academic struggling with early-onset Alzheimer's disease in Still Alice.
Alejandro G Inarritu won the best director trophy for his whimsical dark comedy Birdman Or (The Unexpected Virtue of Ignorance).
Graham Moore grabbed the Best Adapted Screenplay Academy Award for the movie Imitation Game. The Grand Budapest Hotel took the trophy for Best Original Score, while Glory by John Legend and rapper Common won the 2015 Academy Award for the Best Original Song.
Disney's animated film Feast won the Best Short Animated Film Oscars. The story of the Patrick Osborne directed movie revolves around the relationship between a voracious puppy named Winston and the young man who feeds him.
Emmanuel Lubezki was honoured for his cinematography in Birdman.
Eddie Redmayne accepts the award for best actor in a leading role for 'The Theory of Everything' at the Oscars
J K Simmons and Patricia Arquette won their first Academy Awards here on Sunday night when they were bestowed with the Best Performance by an Actor and Actress in Supporting Role for their work in Whiplash and Boyhood respectively.
Craig Mann, Ben Wilkins and Thomas Curley received the Oscar for Best Sound Mixing for their film Whiplash, while Alan Robert Murray and Bub Asman won in the Best Sound Editing category for American Sniper.
Walt Disney's superhero action comedy film Big Hero 6 won the best animated feature film Oscar for its inspiring story of a teenager robotics prodigy, who forms a superhero team to combat a masked villain.
The 3D computer-animated film, inspired by the Marvel Comics superhero team of the same name, won the first Oscar for its directors Don Hall, Chris Williams and producer Roy Conli.
The Visual Effects team of science fiction film Interstellar - Paul Franklin, Andrew Lockley, Ian Hunter and Scott Fisher - was honoured with the Oscar statuette.
Director Pawel Pawlikowski's black-and-white historical drama Ida, about a young woman preparing to become a nun only to discover she is a Jew, won Poland its first Academy award in the best foreign film category.
"Here we are at the epicentre of the noise... Life is full of surprises. I am very much thankful to the Academy and I am overwhelmed," Pawlikowski said while accepting his trophy.
The film saw off competition from Russia's Leviathan, Estonia's Tangerines, Mauritania's Timbuktu and Argentina's revenge drama Wild Tales.
The Grand Budapest Hotel began its winning streak at the 87th Academy Awards, with Milena Canonero walking away with the golden statuette in the Best Costume Design category, and Frances Hannon and Mark Coulier receiving the honour in Best Makeup and Hairstyling category.
The Phone Call, a British short drama film, was the winner in the Best Live Action Short Film category.
