Oscars Mistake: Moonlight Wins Best Picture after La La Land Mistakenly Announced | ABC News

"No, there's a mistake. Moonlight, you guys won best picture" La La Land producer Jordan Horowitz said. "This is not a joke."
Presenters Warren Beatty and Faye Dunaway mistakenly announced La La Land had won the 'Best Pictures' award - but they didn't! Ooops! ...

Moment where crew/cast of 'La La Land' realizes a mistake had been made and 'Moonlight' actually won Best Picture at The Academy Awards.

ABC News