There was disaster at the Oscars on Sunday night as Warren Beatty and Faye Dunaway wrongly announced La La Land as the winner of Best Picture, rather than the triumphant Moonlight.
In a heart-stopping moment the stars and producers of La La Land rushed to the stage to give enthusiastic thank you speeches, before being forced to hand their trophies to the stars of Moonlight.
The terrible end to an otherwise triumphant show left the audience gasping in horror, stunned by the mishap - which appeared to have been caused by Beatty opening the wrong envelope.
In an attempt to explain what happened Beatty returned to the stage - describing how he opened the Best picture envelope to see Emma Stone's name and the words La La Land.
The unbelievable mishap came at the end of an otherwise flawless evening, which saw Casey Affleck and Emma Stone take home their first Oscar.
Casey won Best Actor for Manchester By The Sea, while Emma Stone was crowned Best Actress for her work in La La Land.
Just before that Damien Chazelle won Best Director for La La Land. The musical had already won four other gongs at the event held at the Dolby Theater.
Viola Davis took home her first ever Oscar was crowned Best Supporting Actress for her role in Fences.
The 51-year-old actress gave an impassioned speech about being an actress at the event held at the Dolby Theater in Hollywood on Sunday night.
Viola had tears in her eyes as she said: 'I became an artist, and thank God I did, because we are the only profession that celebrates what it means to live a life.'
It was also a crowning achievement as she became the first black actor to ever receive an Oscar, Emmy, and a Tony.
Earlier in the night, Mahershala Ali took home the gong for Best Supporting Actor for his role in Moonlight.
The directors of Zootopia proudly accepted the Best Animated Feature Film gong.
One even got political during the acceptance speech as they talked about the theme of the movie as they said: 'Zootopia is a story of tolerance being more powerful than fear of the other.'
It was kicked off by an entertaining performance by Justin Timberlake as he did his Trolls hit Can't Stop The Feeling.
贾老板献唱《魔法精灵》主题曲《Can't Stop The Feeling》，为颁奖礼拉开了帷幕。
Then came out host Jimmy Kimmel and starts immediately joking about the state of the US before poking fun at Mel Gibson and saying he's going to bury the hatchet with Matt Damon.
"I've known Matt for a long time now...he's a selfish person, those of you who have worked with him know this. Matt could have starred in Manchester by the Sea," he said, "He could have taken that lead actor part for himself, but he didn't. He handed what turned out to be an Oscar-caliber role over to his friend and made a Chinese ponytail movie instead."
Best Foreign Language Film was won by The Salesman but director Asghar Farhadi chose not to come due to the 'travel ban' but had a statement delivered on his behalf.
The annual awards ceremony hosted by the Academy of Motion Picture Arts and Sciences recognizes excellence in cinematic achievements in the film industry as assessed by the Academy's voting membership.
Romantic showbiz musical La La Land topped the Oscars nominations list with a whopping 14 nods.
The number ties the record set by Titanic and All About Eve.
After last year's #OscarsSoWhite controversy, seven of the 20 actors nominated for awards are non-white.
Industry pundits had predicted that a number of black actors and filmmakers would be recognized this year, after calls for a boycott erupted last year when no black actors were among the 20 nominees in the main acting categories.
In a bid to address the issue, the Academy subsequently named nearly 700 new members, almost half of them women and nearly as many people of color.
The Academy's board of governors has vowed to double the number of female and ethnic minority members by 2020.
Nighttime talk show funnyman Jimmy Kimmel hosts Hollywood's glitziest ceremony this year.
Ahead of the awards Kimmel told USA Today that he's promising humor and respect.
'That’s not to say I won’t be making fun of people and things. I will but I do recognize for a lot of people this is the biggest night of their professional lives and the last thing I want to do is ruin it for someone. '
The 49-year-old admitted that he was feeling the pressure to do well.
'It’s one thing to bomb on a Wednesday night in front of three million people,' he said. 'But it’s another thing entirely to bomb at the Oscars. It stays with you your whole life.'
最佳原创歌曲：《City Of Stars》-《爱乐之城》
The youngest person to receive an Oscar was five-year-old Shirley Temple in 1934, although it was an honorary award for children. The youngest to win a competitive Oscar was Tatum O'Neal, who was 10 when she bagged best supporting actress for "Paper Moon" in 1974.
The oldest winner was Christopher Plummer, who was 82 when he took home best supporting actor in 2012 for "Beginners." The oldest best actor winner was Henry Fonda, for "On Golden Pond" in 1982. He was 76.
The oldest nominee remains Gloria Stuart, who was 87 when she was recognized for her role as an elderly Rose in 1997's "Titanic".
The only Oscar winner with Oscar-winning parents is Liza Minnelli, who won best actress for "Cabaret" in 1973. Her mother Judy Garland received an honorary award in 1939 and her father Vincente Minnelli won best director in 1958.
Three movies have won 11 Oscars: "Lord of the Rings: The Return of the King" (2003), "Titanic" (1997) and "Ben-Hur" (1959). "Titanic," "All About Eve" (1950) and "La La Land" (2016) share the record for most nominations, with 14 each.
The only movie to achieve a clean sweep of every award for which it was nominated is "The Return of the King" while three contenders -- "It Happened One Night" (1934), "One Flew Over the Cuckoo's Nest" (1975) and "The Silence of the Lambs" (1991) -- have swept the "big five" awards (best picture, actor, actress, director and screenplay).
The star with the most acting statuettes is Katharine Hepburn, who won best actress in 1934, 1968, 1969 and 1982. Daniel Day-Lewis has three best actor Oscars.
Meryl Streep holds the record for the most nominations for acting, with 20.
The movie industry figure with the most Oscars is Walt Disney, who won 22, plus four honorary statuettes.
Sound engineer Kevin O'Connell goes into the 89th Academy Awards with his 21st nomination. He has lost on each occasion, starting with "Terms of Endearment" in 1983, earning him the title "the unluckiest nominee in history."