It's the biggest awards ceremony on Hollywood's calendar, and the glitziest red carpet in town. See the best dressed stars from across the decades in our edit of the most stunning dresses of all time...
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1. Nicole Kidman in Christian Dior
Nicole Kidman made a fashion statement at the 1997 Oscars in a bright satin Christian Dior dress that upstaged the man on her arm, Tom Cruise.
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2. Julia Roberts in Vintage Valentino
'Pretty Woman' Julia Roberts opted for old-fashioned glamour in a vintage black and white Valentino dress at the 2001 Oscars. Clutching her gong she looked every inch the Hollywood star.
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3. Cate Blanchett in Valentino Couture
Cate Blanchett turned heads at the 2005 Oscars in a beautiful pale yellow Valentino Couture gown. With a vintage-inspired hairdo and glamorous train, this is one iconic look!
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4. Kate Hudson in Versace
Kate Hudson proved less is more as she hit the 2003 Oscars in a nude coloured, lace gown by Versace. Gorgeous!
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5. Audrey Hepburn in Givenchy
Hollywood legend, Audrey Hepburn wowed the crowd with her teeny tiny waist and classic beauty in this Givenchy number at the 1954 Academy Awards. Picture: Rex
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6. Elizabeth Hurley in Versace
Elizabeth Hurley amped up the LWD look with some major embellishment courtesy of Versace at the 1995 Oscars. Picture: Getty
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7. Halle Berry in Elie Saab
Probably her most memorable dress to date, Halle Berry decided to be brave at the 2002 Academy Awards and give fans a little more than they bargained for in this see-through Elie Saab gown. Picture: PA
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8. Kate Winslet in Ben De Lisi
Kate Winslet made sure all eyes were on her at the 2002 Oscars in this stunning red Ben De Lisi gown. Picture: PA
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9. Angelina Jolie in Marc Bouwer
Draping her A-list body in a beautiful sheet of silk, Angelina Jolie chose this simply breathtaking gown by Marc Bouwer to wear to the 2004 Academy Awards. Picture: PA
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10. Keira Knightley in Vera Wang
Keira Knightley worked the gothic glam trend at the 2006 Oscars with this elegant taffeta custom-made Vera Wang dress. Picture: PA
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11. Michelle Williams in Vera Wang
Michelle Williams opted for an unusual mustard yellow dress by Vera Wang for the Academy Awards in 2006 by my, didn't it pay off. Picture: PA
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12. Penelope Cruz in Atelier Versace
Taking the opportunity to do full-on red carpet glamour, Penelope Cruz hit the 2007 Oscars in an elaborately feathered Atelier Versace dress. Picture: PA
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13. Cameron Diaz in Oscar de la Renta
Cameron Diaz looked truly beautiful in this princess style Oscar de la Renta gown at the 2010 Academy Awards.
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14. Mila Kunis in Elie Saab Couture
Mila Kunis wowed everyone when she stepped out in this colourful lilac Elie Saab Couture gown at the 2011 Oscars. Picture: PA
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15. Jennifer Lopez in Zuhair Murad
Jennifer Lopez enhanced her famous curves in this cleverly designer gown by glitz king, Zuhair Murad at the 2012 Academy Awards.
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16. Anne Hathaway in Prada
Anne Hathaway was the talk of the 2013 Oscars and not just because of this stunning Prada pink frock. Picture: PA
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17. Jennifer Aniston in Valentino
Opting for a bold red shade at the Academy Awards in 2013, Jennifer Aniston steals the spotlight in front of the flashbulbs.
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18. Jennifer Lawrence in Dior Couture
Going for all-out glamour, Jennifer Lawrence made her Oscars mark in this opulent, bridal-inspired frock by Christian Dior couture.
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19. Charlize Theron in Dior
The Aussie beauty puts her supermodel body on display in a stunning, gothic-inspired Christian Dior gown at the 2014 Academy Awards.