The Academy Award had a perfect record for 50-years running before this Best Picture flub.
However, a similar snafu occurred back in 1964. Sammy Davis Junior announced the nominees for Adapted Music Score. But unwittingly announced the winner of Original Music Score.
The crowd murmured and corrected Sammy Davis Junior that he had the wrong category. He looked over both shoulders and quipped, “They gave me the wrong envelope? Wait'll the NAACP hears about this!”
The audience roared with laughter.