Some movies are lucky to get an acting nomination at the Oscars, while others get nominations in multiple acting categories. But there are even fewer cases of costars nominated in the same category for the same film. While Best Supporting Actor and Best Supporting Actress are more likely than the two lead categories to have costars nominated for the same Academy Award, there are still 17 examples of leading stars achieving this.
The scarcity of this can often be attributed to how rare it is for two stars of the same gender in the same movie to have true leading roles. And even when they do, one star typically competes in the Supporting category, to maximize potential to win (a.k.a. "category fraud"). After all, costars nominated in the same category guarantees at least one loss unless there's the miniscule chance of a tie. However, the list of Oscar nominees for Best Actor in a Leading Role and Best Actress in a Leading Role for the same movie is made up of some of history's greatest actors and actresses, who wouldn't dare be caught dead in the measly supporting categories!
Here are 17 instances of costars who got Oscar nominations for the same movie in the same lead acting category.