But the wrong envelope has been handed out more than once

Shockingly, 2017 wasn’t the first time a presenter has been given the wrong envelope, although in the previous case it was for a more minor award. At the 1964 Oscars, Sammy Davis Jr., presenting the Oscar for Best Adaptation or Treatment Score, read the name on the card he was handed, John Addison for Tom Jones – but as Addison hadn’t even been nominated in the category, the mistake was immediately apparent. “They handed me the wrong envelope,” Davis told the crowd. Upon being presented with the correct one and taking out his glasses, he quipped, “I ain’t gonna make no mistake this time,” before announcing the real winner, André Previn for Irma La Douce.
The first Oscars were nearly a century ago

It’s hard to believe the Academy Awards are almost 100 years old. The very first Oscars were held in the Blossom Room of the Hollywood Roosevelt Hotel on Thursday, May 16, 1929, with movies eligible from 1927 and 1928. The first Best Picture winner was the World War I aviation epic Wings, starring Clara Bow. The film, which won in part because of its amazing aerial scenes, also holds the distinction of being the only silent movie ever to win Best Picture. (Although The Artist, 2011’s winner, was a throwback to the silent era with no dialogue until the very end, it featured sound effects and music, so doesn’t count as a true “silent picture.”)
There’s only been one Oscar to win an Oscar

It’s hard to believe, but a search of the Academy’s official database yields only one person named Oscar that ever actually won an Oscar: lyricist Oscar Hammerstein II. He was nominated for five Oscars and won two, for “The Last Time I Saw Paris” from Lady Be Good (1941) and “It Might As Well Be Spring” from State Fair (1945). His music partner Richard Rodgers, who shared Hammerstein’s 1945 award, later became the first EGOT winner in history: A person so accomplished they nabbed all four major entertainment awards, an Emmy, Grammy, Oscar and Tony.