Très Chic! Cannes' 10 Most Memorable Gowns of the DecadeTake a look back at Rachel McAdams's Marchesa with a five foot-long train, Eva Longoria's snow-white Pucci and more unforgettable dresses from the French film festival

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2011: RACHEL MCADAMS

One part Old Hollywood screen siren and one part French femme fatale, the actress was 100 percent gorgeous in a red Marchesa gown complete with illusion cap-sleeves and a sheer 5-foot-long train at the Midnight In Paris premiere.