Every year the Academy evaluates a year's worth of brilliant performances and picks what they believe to be the best of the best, nominating these for the most prestigious acting awards in cinema: the Oscars. This in itself is an honor - just to be nominated for an Academy Award. But only one person can win each year, and the women listed here have all taken home Oscar gold for Best Actress in a Leading Role - so which Best Actress Oscar winners are the best?
Of the leading women who have won Best Actress, who is the best Best Actress? Is it the most nominated women of all time Meryl Streep, with 15 nominations? Is it a classic actress like Katharine Hepburn (who has the most wins, with four)? What about Audrey Hepburn, or Grace Kelly? Maybe a more modern choice like Hilary Swank, Cate Blanchett, Jennifer Lawrence, or Julianne Moore?
With so many options choosing the best is hard, but that's where you come in. Vote up the very best actresses of all the Best Actress Academy Award winners below!