While Hollywood gets ready for the show, here's a look back at who triumphed on Hollywood's biggest night 10, 20 and 30 years ago.
2009: The 81st Academy Awards
Rewind 10 years and "Slumdog Millionaire" ruled the night. The film won eight of the 10 awards it was nominated for, including best picture, best director, best original song and best original score.
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Other top winners included Sean Penn as best actor in a leading role for "Milk," Kate Winslet as best actress for "The Reader" and Penelope Cruz as best supporting actress in "Vicky Cristina Barcelona." Heath Ledger was posthumously awarded the Oscar for best supporting actor for "The Dark Knight," and his father, mother and sister accepted the award on his behalf.
Other nominated films included "The Curious Case of Benjamin Button," "Wall-E," "Doubt" and "Iron Man."
The Feb. 22, 2009, telecast was hosted by Hugh Jackman and took place at the Kodak Theatre, which has since been re-christened the Dolby Theatre. Beyonce, Zac Efron, Vanessa Hudgens, John Legend and Queen Latifah were among the show's performers.
1999: The 71st Academy Awards
Flash back another decade to 1999, a big night for "Shakespeare in Love." The star-studded period dramedy walked away with seven of the 13 awards for which it was nominated, including best picture, best actress, best supporting actress, best screenplay and best music.
Roberto Benigni took home best actor for "Life is Beautiful," James Coburn won best supporting actor for "Affliction," and Gwenyth Paltrow and Judi Dench won best actress and best supporting actress, respectively, for "Shakespeare in Love." Steven Spielberg won his third Oscar as best director for "Saving Private Ryan."
Whoopi Goldberg took the reigns as the telecast's host at Dorothy Chandler Pavillion. Goldberg was introduced as "Her Majesty Whoopi Goldberg" and opened the show dressed in Victorian garb. Mariah Carey, Aerosmith, Whitney Houston, Celine Dion and Andrea Bocelli were among the night's performers.
1989: The 61st Academy Awards
Thirty years ago, "Rain Man" and "Who Framed Roger Rabbit" tied as big winners with four trophies each. There was only one best, picture, though, an honor "Rain Man" claimed along with best screenplay, best director and best actor for Dustin Hoffman.
Jodie Foster won best actress for "The Accused," Geena Davis won best supporting actress for "The Accidental Tourist" and Kevin Kline won best supporting actor for "A Fish Called Wanda."
Notably, the March 29 telecast at the Shrine Civic Auditorium was the last time that the show didn't have a host.
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