Oscar 2012: Red Carpet

Angelina Jolie and Brad Pitt on the red carpet.

Jolie, who is presenting the awards for Best Adapted and Original Screenplay, wore Atelier Versace.

Best Actor nominee George Clooney walked the red carpet with girlfriend Stacy Keibler. Stacy wore a Marchesa dress while Clooney was in a Giorgio Armani tuxedo.

Anil Ambani poses with director Steven Spielberg and Dreamworks head Stacey Snider.

Michelle Williams looked gorgeous in a Louis Vuitton and she finished her look with Forevermark and Fred Leighton jewels and a Bottega Venetta bag. She's up for Best Actress.

Best Actress nominee Viola Davis walked the red carpet in a strapless green custom Vera Wang gown.

Jessica Chastain looked amazing in an Alexander McQueen dress. She is nominated for Best Supporting Actress.

Best Supporting Actress nominee Berenice Bejo walked the red carpet in an Elie Saab gown.

Best Actress winner Meryl Streep on the red carpet. This was her Oscar 17th nomination.

Best Actor nominee Jean Dujardin hits the red carpet his wife Alexandra Lamy.

Sacha Baron Cohen walks the red carpet as his character from The Dictator.

Rooney Mara looked stunning in Givenchy, she is nominated for her role in The Girl with the Dragon Tattoo.

This year's presenter Penelope Cruz looked stunning in a grey Armani Prive gown.

Jennifer Lopez looked amazing in a Zuhair Murad dress with a Ferragamo clutch.

Last year's Best Actress winner Natalie Portman is red hot in a Dior Haute Couture dress.

Sandra Bullock on the red carpet.

Octavia Spencer,who bagged the Best Supporting Actor, wore a Tadashi Shoji gown.

The Best Actress nominee Glenn Close wore a green Zac Posen gown with Bulgari earrings.

Tina Fey walked the red carpet in a custom made Carolina Herrera dress and Bulgari jewels.

Rose Byrne hit the red carpet in a Vivienne Westwood dress with Chanel Fine Jewellery and Jimmy Choo shoes.

Last year's Best Actor winner Colin Firth with his wife Livia. She wore a red custom Valentino gown.

Emma Stone looked stunning in a Giambattista Valli Haute Couture dress.

Gwyneth Paltrow walked the red carpet in a white Tom Ford gown. She wore a floor-length cape over the gown.

Cameron Diaz , who is also one of the presenters, rocked a Gucci dress worn with jewels by Tiffany & Co.

The royal walk: Princess Charlene and Prince Albert of Monaco on the red carpet.

Nominated for Best Supporting Actor Jonah Hill on the red carpet.

Milla Jovovich looked stunning in an Elie Saab gown worn with Jacob & Co. jewellery.

Penelope Ann Miller wore a Badgley Mischka dress with Blue Nile jewellery on the red carpet.

Oscar 2012: Red Carpet

Stars walk the red carpet on 84th Academy Awards