This year's Oscars saw success for films including Bohemian Rhapsody, Black Panther and Green Book.
Here are the best pictures from some of the key moments at the ceremony in Los Angeles.
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Green Book producer Charles Wessler spoke on stage alongside director Peter Farrelly (right) and cast and crew after the film won the top award, best picture
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Olivia Colman made headlines with her best actress win for her role as Queen Anne in The Favourite
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The British actress gave a heartfelt speech, saying: "It's genuinely quite stressful. This is hilarious. I got an Oscar!"
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After accepting her award, Colman gave fellow nominee Lady Gaga a kiss
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Rami Malek also got a kiss from co-star Lucy Boynton when he won best actor for Bohemian Rhapsody
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Malek won the award for his portrayal of Freddie Mercury in the Queen biopic
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Director Alfonso Cuaron gave Yalitza Aparicio, the star of his film Roma, a hug after winning the best director award
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Earlier in the evening, Cuaron also picked up the Oscar for best foreign language film, presented by Angela Bassett and Javier Bardem
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Spike Lee leapt into the arms of Samuel L Jackson after winning the best adapted screenplay award for BlacKkKlansman
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Lee won the award alongside Charlie Wachtel (left), David Rabinowitz and Kevin Willmott
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Black Panther won three Oscars during the evening, including the best costume design award, which went to Ruth Carter
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BlacKkKlansman writer and director Spike Lee gave Ruth Carter a congratulatory kiss
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Hannah Beachler won an Oscar for best production design for Black Panther, saying: "I stand here stronger than I was yesterday." Like Carter, Beachler was the first black winner in her category
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Ludwig Goransson won best original score for Black Panther
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Other winners from the evening included Regina King, who scooped the best supporting actress award for If Beale Street Could Talk
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Mahershala Ali (far right) won best supporting actor for his role in Green Book, seen here posing with fellow Oscar-winning actors (left to right) Rami Malek, Olivia Colman and Regina King
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The film A Star is Born won best original song for the song Shallow, with Lady Gaga giving a heartfelt speech
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Free Solo won the best documentary award, with the film-makers posing in the press room (left to right): Elizabeth Chai Vasarhelyi, Jimmy Chin, Evan Hayes and Shannon Dill
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Becky Neiman-Cobb (left) and 'Bao' Domee Shi tasted their victory after winning best animated short film
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The ceremony had no official hosts, but presenters included (left to right) Maya Rudolph, Tina Fey and Amy Poehler
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Melissa McCarthy appeared on stage dressed in an outfit inspired by Olivia Colman's character in The Favourite, complete with rabbits attached to her royal robes
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Actor Brian Tyree Henry appeared alongside McCarthy, with his take on a historical costume
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Helen Mirren presented alongside Aquaman star Jason Momoa
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Actor Keegan Michael Key made quite an entrance, flying down from the roof clutching an umbrella
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