It was the Gaffe Heard and Seen and Laughed at "Round the World.
To wrap up the 2017 Academy Awards, Warren Beatty and Faye Dunaway were handed the wrong envelope.
As a result, they announced La La Land as Best Picture… only for the cast and crew to take to the stage and be told that an epic mistake had occurred.
The winner was actually Moonlight.
In response, director Barry Jenkins was handed the trophy and gave a speech – and the Internet sprung into action!
Here"s a look at the most hilarious memes this stunning mistake inspired shortly after it was made: