When Mark Wahlberg announced a tie for the Best Sound Editing Oscar — the editors from Zero Dark Thirty and Skyfall took home the award — it became the sixth occurrence in the Academy’s history.
According to the AMPAs database, the first happened in 1931-32, when Dr. Jekyll & Mr. Hyde‘s Frederic March and The Champ‘s Wallace Beery each won the Best Actor award. However, the vote count wasn’t an actual tie — Beery received one more than March, but the rules at the time stated two winners would be honored if the count was within three votes. The rule subsequently changed.
In 1949, A Chance to Live and So Much for So Little both won the Best Documentary Short award. Katharine Hepburn and Barbra Streisand tied for the Best Actress statuette in 1968, for their respective roles in The Lion in Winter and Funny Girl. The fourth tie occurred in 1986, when Artie Shaw: Time Is All You’ve Got and Down and Out in America were honored for Best Documentary. Finally, Franz Kafka’s It’s a Wonderful Life and Trevor both won the Best Short Film (Live Action) award in 1995.