2019 Oscar winners in key categories

Here are the winners in key categories at the 91st Academy Awards.

RELATED: The most-talked about red carpet looks at the Oscars 2019

"Green Book" took home the best picture Oscar, while Alfonso Cuaron's "Roma" won for best director, best foreign film and best cinematography.

Top acting honors were shared among four different films.

RELATED: Controversial race drama 'Green Book' wins Oscars Best Picture

• Best picture: "Green Book"
• Best director: Alfonso Cuaron, "Roma"
• Best actor: Rami Malek, "Bohemian Rhapsody"
• Best actress: Olivia Colman, "The Favourite"
• Best supporting actor: Mahershala Ali, "Green Book"
• Best supporting actress: Regina King, "If Beale Street Could Talk"
• Best foreign language film: "Roma" (Mexico)
• Best cinematography: Alfonso Cuaron, "Roma"
• Best animated feature: "Spider-Man: Into the Spider-Verse"
• Best documentary feature: "Free Solo"
• Best original screenplay: "Green Book" - Nick Vallelonga, Brian Currie and Peter Farrelly
• Best adapted screenplay: "BlacKkKlansman" - Spike Lee, Charlie Wachtel, David Rabinowitz and Kevin Willmott
• Best original score: "Black Panther" - Ludwig Goransson
• Best original song: "Shallow" from "A Star Is Born," Lady Gaga

RELATED: Lady Gaga wins first Oscar, social media swoon over her performance with Bradley Cooper

— Agence France-Presse