The 66th Annual Cannes Film Festival officially kicked off on Wednesday, as the glitterati donned their red carpet best to attend the "Great Gatsby" screening at the 2013 opening ceremony. All of our favorites, from Cara Delevingne to Carey Mulligan, arrived in the French Riviera, ready for the glamorous 12 days ahead. Click through to see some of the gorgeous looks that kicked off the festivities.