The Past star wowed in an Alexis Mabille number that featured a navy blazer over an ivory strapless bustier gown with a lace tiered skirt.
The Iron Man 3 actress went for a minimal approach and wore an embellished knee-length frock that showcased her petite frame.
Looking sophisticatedly sexy, the brunette beauty dons an embellished Sanchita Ajjampur gown featuring a thigh-high slit with Jimmy Choo Lance sandals.
The Great Gatsby actor looks mighty dapper at the event.
JT has never looked sharper! The "Suit and Tie" entertainer makes a stylish appearance in a beige coat, trendy shades and an AllSaints Manor tie.
The blond beauty looks red hot in a Roberto Cavalli number with a plunging neckline, cutouts and embellished trims.
Beyoncé's little sis debuts a Stéphane Rolland feather-accented nude gown with Chopard jewels and a Jimmy Choo clutch.
The star makes an quirky statement in a pink and polka-dot Miu Miu dress and a pair of black-and-yellow platforms by the designer.
The Bling Ring star opts for a burgundy crop top and high-waisted skirt featuring purple feathers by Christopher Kane.
Looking lovely and elegant, the actress steals the spotlight in a Gucci chiffon gown with an embellished belt.
The gangs all here! The Great Gatsby stars kicks off the film festival in serious style.
Rain check! The star tries to keep her Dior gown dry.
At the same premiere, the Oscar-winner brightens up in a floral Christian Dior dress with bright pink Jimmy Choo pumps.
The actress looks red hot in a Oscar de la Renta gown.
The actress looks lovely in a Christian Dior Couture gown.
The singer poses in a stunning patterned gown at the The Great Gatsby premiere.
Proving that 40 truely is the new 20, the ageless supermodel wows in a Roberto Cavalli.
Before their big premiere the costars gather for a quick photo op.
Hey girl! The actress strolls in a Alexander McQueen LBD.
NEXT GALLERY: Cannes Film Festival: Best Looks Ever