What they'll wear on Sunday night is a closely guarded secret, so here's a look back at what this year's nominees in the Best Actress and Best Supporting Actress categories wore to past Oscars ceremonies. Not pictured (because they haven't photographed by AP or Getty at an Oscars ceremony): Melissa Leo (nominated for Best Actress in "Frozen River") and Viola Davis (nominated for Best Supporting Actress in "Doubt").
Which looks do you love? Weigh in below.
(Photos from AP and Getty)