Elizabeth Mitchell wore:
Gown: Roberto Cavalli
Jewelry: Bavna
Shoes: Brian Atwood
Clutch: Judith Lieber
She was styled by Annie Jagger.

Beyonce wore:

Dress:  Roberto Cavalli, black silk shantung minidress from pre-S/S10

Shoes:  Rock & Republic, "Celina" suede platform pump with dangling spike detail

She is styled by Ty Hunter.

Beyonce wore a minidress from Roberto Cavalli with shoes from Cesare Paciotti.  Jewelry was from Lorraine Schwartz.  She is styled by Ty Hunter.

Kathryn Morris wore a gown from Roberto Cavalli.  Her shoes and bag were from Jimmy Choo.  Her jewelry was from Kajanzian Brothers.  She was styled by Gena Tuso.

Britney Spears wore a leather dress from Roberto Cavalli's F/W09 collection.  Her shoes were Jimmy choo "Gesture" sandals.

Demi Moore wore a dress from Zac Posen with Brian Atwood for Bally shoes.  She wore garnet and gold earrings and diamond, platinum, garnet and gold bracelets from Neil Lane.

Demi is styled by Rachel Zoe.

Jaime Pressly wore a dress form Joey Tierney Couture with shoes from Dior and a bag from Fendi.  She wore onyx, diamond and platinum rings from Neil Lane.

Jaime is styled by Joey Tierney.

Olivia Wilde wore a black satin bustier dress from Dolce & Gabbana with Sergio Rossi black crystal heels.

She is styled by Kemal & Karla.

Serena Williams wore Roberto Cavalli from the pre-fall 09 collection.

PHOTOS COURTESEY OF ELEVATION PHOTOS.

Lucy Liu wore a coral Paul & Joe dress with a belt from LAI to the party in NYC.  Her shoes were Jimmy Choo "Idol" platforms, and she carried a clutch from Prada.  She was styled by Lee Harris.

Blake Lively wore a dress from Roberto Cavalli Summer 09 collection.

Click through for more pics + Evan Rachel Wood ...

Angelina Jolie looked stunning in a barely there nude gown from Versace Ateliers, with Versace accessories.  Gown was tea-rose chiffon with draped motif over the bustier. Jewelry is Lorraine Schwartz.  She carried a Ferragamo silk bow clutch from Ferragamo.  Styled by Jen Rade.  Brad Pitt stuck with Tom Ford, wearing a sating peak lapel evening suit from the designer.

Diane Kruger wore a ivory silk chiffon with silver embroidered detail from Marchesa.  She carried a Roger Vivier clutch and wore Chanel Couture Jewelry.

Robin Wright wore a white silk crepe Narciso Rodriguez gown.  Her shoes were Jimmy Choo's "Seduce" sandals.  Her clutch was a Sergio Rossi woven satin compact in silver.  Jewelry was from Cartier.  She is working with stylist Cher Coulter for the fest.

Dita von Teese wore a Christian Dior Haute Couture dress with Louboutin purse and shoes.  Her earrings and rings were from De Grisogono.  Dita does not work with a stylist for the red carpet.

Michelle Yeoh wore another Roberto Cavalli gown to the premiere.  (Hope she is enjoying plenty of 3pm champagne lunches on the yacht!)  Her shoes were Versace.  Her watch is from Audemars Piguet.  Michelle is styled by CK&K.  Makeup was by Delphine of L'Oreal and hair from Terry Millet of L'Oreal. 

Shu Qi also wore Roberto Cavalli.

The word glamazon comes to mind seeing Sharon show off her legs in this Balmain gown from the F09 collection.  Her watch is from the Dior Horlogerie collection.  Sharon works with stylist Kristi Brooks.

Asia Argento wore this sexy red and black gown from Armani Prive.

BJ Novak (pictured at the afterparty) wore Moschino Uomo wide peak lapel tuxedo.

Marion Cotillard wore a Lanvin dress with Dior shoes and Chopard jewelry.  Her clutch (not pictured) was Swarovski.  She's pictured with her husband Guillaume Canet, who is wearing a YSL navy blue wool and mohair tuxedo and black cotton shirt from Cruise 09 collection.

Eva Herzigova is wearing Roberto Cavalli with Guiseppe Zanotti shoes.

Peaches Geldof wore Palue Ka.

Earlier in the day, Marion presnted the trophy wearing a Elie Saab dress, YSL shoes and Chopard jewels.

Robin Wright wore a Narcisco Rodriguez black wool crepe dress and carried the Jimmy Choo "Cara" clutch.  Earrings were from Louis Vuitton "Les Craquantes" collection, bracelet was Louis Vuitton "Les Luxuriantes" collection.

Newest L'Oreal girl Evangeline Lilly made her first appearnce at the festival in a Valentino Haute Couture S/S09 dress and carried a Ferragamo bronze braided leather clutch.

You can't quite tell the color in this photo, but Kristin Scott Thomas wore a Lanvin mightnight blue tulle and silk taffeta evenign gown with tiered skirt from Fall 09, with makeup by Dior.

Asia Argento wore a navy strapless gown from Roberto Cavalli.

Michelle Yeoh wore Roberto Cavalli.

Shu Qi wore Valentino pre-Fall 09.

Doutzen Kroes wore Roberto Cavalli.

Devon Aoki wore a lime green Roberto Cavalli gown from the Cavalli Couture Collection to the perfume launch event from the festival's sponsor.  Jewels were also from Chopard.

Alessia Piovan wore an Alberta Ferretti gown and jewelry was from Chopard.  Alessia worked with Ms. Ferretti directly.

Festival juror Robin Wright attended the Cannes Film Festival opening night premiere of "Up" wearing an off-the-shoulder hand-draped gown in platinum silver from Elie Saab Vintage Couture.  Shoes were Jimmy Choo's "Smooth" silver sandal and jewelry is diamond and white gold earrings and bracelet from Louis Vuitton Les Ardentes Collection.  Robin worked with stylist Cher Coulter for this event. 

New L'Oreal spokesperson Elizabeth Banks looked glamorous in a one-shouldered Armani Prive gown.  Jewels were from Chopard and shoes were Jimmy Choo "Cheetah" satin platform sandals. She did not work with a stylist for this event. 

Tilda Swinton arrived wearing a bordeaux Haider Ackerman skirt, shirt, and suede jacket ensemble.  She does not officially work with a stylist.

French actress and this year's Cannes jury President Isabelle Huppert chose a champagne Armani Prive gown worn with Chopard diamond cuffs.

Asia Argento posed for photographers in a pagoda print Armani Prive gown and black accessories.  More details soon!

A delicate Shu Qui graced the red carpet in an iridescent chiffon gown by Roberto Cavalli paired with a Cartier diamond necklace and bracelet.

Aishwarya Rai Bachchan chose a white tiered Roberto Cavalli gown from the Cavalli Couture Collection.  She completed the look with red peeptoe heels, a Swarvoski clutch, and pearl earrings.

Alessia Piovan wore Alberta Ferretti to the premiere and worked with Ms. Ferretti directly to dress her for the premiere and the Chopard party later in the evening.  Jewelry was also Chopard. 

Beyonce arrived for the taping of The Late Show With David Letterman wearing a Roberto Cavalli dress from pre-Fall 09, with a gorgeous Jillian Lewis "Ruffle Hem Trench".

For her performance she wore she wore a white Elie Saab Fall 09 RTW collection with an asymmetrical sleevless cocktail dress with tulip skirt.

For her interview she wore another Elie Saab dress from the same collection, this time in a wool crepe cocktail dress with bolero in cobalt blue.

Beyonce is styled by Ty Hunter.

On the red carpet, Miley wore an embellished gown from Monique Lhuillier, shoes from Cole Haan and jewelry from H. Stern.  She was styled by Tara Swennen.

Taylor Swift wore an Angel Sanchez gown.  Her clutch was VBH "Manila P" in Silver Sparkle.  Jewels were from Neil Lane platinum and black diamond drop earrings and ruffle cuff bracelet. Shoes were Louboutin.  She was styled by Joseph Cassell.

Carrie Underwood wore a pale pink Randi Rahm gown.  Her clutch was Mary Norton.

Kellie Pickler wore a Zuhair Murad gown.  Kellie's clutch was Daniel Swarovski and shoes were YSL.  Kellie was styled by Renne Layher.

Jennifer Love Hewitt wore a Robert Rodriguez dress.  Clutch was Gucci and shoes were Valentino.  Her earrings were from Tiffany and her bracelets from Simon J.

Click through for more red carpet dresses and Miley, Taylor & Carrie's onstage looks ....

Elizabeth Banks wore a white Roberto Cavalli dress from S/S 09 collection.  Elizabeth is styled by Wendi + Nicole.

More pics after the jump ....

Carla Gugino wore a Roberto Cavalli gown with Jimmy Choo shoes and bag to the LA premiere of Watchmen.  Her earrings were from Coomi.  Rings were from Lucifer Vir, the Honestus snake ring and the Honestus yellow barrel ring.  Bangles were from Ippolita.  Carla was styled by Jessica Paster.

Taraji Henson is wearing a Roberto Cavalli gown, Fred Leighton jewels, Jimmy Choo shoes and carrying a Mary Norton bag.  Taraji was styled by Sherri Hoke.

Dress:  Roberto Cavalli

Shoes:  Jimmy Choo

Styled by:  Jessica Paster

Beauty Credits:  Joanna Schlip for Dior Beauty.

Dress: Roberto Cavalli ... black crepe de chine v-neck black gown with beaded detail at neck.

Clutch:  VBH

Styled by:  Tom Broecker