Viola Davis in Vera Wang
Viola hit the red carpet in a custom-made emerald green Vera Wang strapless gown with floral crystal accents at the bustline and a pleated chiffon train.
She rocked her natural hair, allowing the focus to fall on her amazing diamond-and-emerald earrings. A diamond cuff and a glittery clutch finished the look.
Rose Byrne in Vivienne Westwood
Rose donned a glittering black Vivienne Westwood sequined one-shoulder column gown that revealed her black Jimmy Choo platform peep-toes.
The backless number was teamed with Chanel jewelry and a black clutch.
Glenn Close in Zac Posen
Glenn was a vision of sophistication in a forest green Zac Posen mermaid gown worn with a matching tailored blazer fresh from the Fall 2012 collection.
Sarah Hyland in Alberta Ferretti
The 'Modern Family' actress looked lovely in a lavender Alberta Ferretti gown which featured asymmetrical sleeves and a gathered bodice that went down the skirt in flowing pleats.
A romantic loose updo and glossy lips finished the look.
Meryl Streep in Lanvin
Meryl shined in a custom made gold lamé Lanvin draped gown accented with a chain link belt.
She went matchy-matchy with a gold Lanvin clutch, gold Salvatore Ferragamo sandals and gold jewels.
Kristen Wiig in J.Mendel
The 'Bridesmaids' actress arrived in a nude J.Mendel Pre-Fall 2012 strapless gown with a ruffled tiered tulle skirt.
She kept it simple with loose waves, nude lips and silver jewels.
Octavia Spencer in Tadashi Shoji
'The Help' actress stayed loyal to her favorite designer, Tadashi Shoji, in a white beaded gown with a gathered detail at the waist that draped across the skirt.
A crystal Judith Leiber clutch and Lorraine Schwartz diamond drop earrings completed her look.
Milla Jovovich in Elie Saab
She paired the dress with bold red lips, an Edie Parker box clutch and refined diamond jewels.
Kate Mara in Jack Guisso
Kate sported her sister Rooney and for the occasion she wore a blush pink Jack Guisso Couture Spring 2012 belted gown with floral appliqués and a draped sleeve.
Pretty pink lips and a loose bun added an extra romantic touch.
Tina Fey in Carolina Herrera
Tina went classic in a simple custom-made midnight blue Carolina Herrera strapless gown with a peplum details.
Her accessories included a black Roger Vivier clutch and fabulous Bulgari jewels including blue chandelier earrings and a matching cocktail ring.
Stacy Keibler in Marchesa
George Clooney's girlfriend stunned in a gold Marchesa off-the-shoulder draped gown with a gathered rose detail on the hip from the recent Fall 2012 collection.
Her hair was styled in soft waves swept to the side and her make-up looked subtle with pink glossy lips. She also carried a matching box clutch.
Louise Roe in Black Halo
The ensemble was worn with Jacqueline Nerguizian jewels, a silver clutch and a girly side bun.
Leslie Mann in Roberto Cavalli
Leslie looked ultra-elegant in a midnight blue Roberto Cavalli strapless gown with sequined panels.
Her ensemble was complemented with a simple ponytail, a Judith Leiber clutch and gorgeous sapphire earrings.
Busy Philipps in Dolce & Gabbana
Busy opted for a dark grey Dolce & Gabbana strapless lace dress with a gathered detail at the waist.
Her dress is a bit boring for such a big event like the Oscars but I do love her bold accessories. She added some colour with fuchsia Brian Atwood peep-toes and statement Irene Neuwirth earrings.
Berenice Bejo in Elie Saab
'The Artist' actress choose a mint green Elie Saab long sleeve embroidered gown with a plunging neckline from the Spring 2012 Couture collection.
The rest of the look included a custom-made Swarovski clutch and emerald-and-diamond Chopard drop earrings.
Maria Menounos in Maria Lucia Hohan
The TV personality looked like a goodess in a mint Maria Lucia Hohan gown which was paired with Jacob & Co. diamonds and a glamorous loose bun.