The Best Picture gaffe wasn't the only mistake at last night's Oscars.
The wrong picture was used to remember a woman who died in the past year.
The In Memoriam section showed a photo of Producer Jan Chapman instead of the Costume Designer Janet Patterson who had passed away.
Jan Chapman said she was very upset: "I was devastated by the use of my image in place of my great friend and long-time collaborator Janet Patterson. I had urged her agency to check any photograph which might be used and understand that they were told that the Academy had it covered"
She added: "Janet was a great beauty and four-time Oscar nominee and it is very disappointing that the error was not picked up. I am alive and well and an active producer."