Amanda Seyfried was stunning in Giorgio Armani Privé number. Picture APRegina King looked gorgeous in custom Louis Vuitton. Picture: APHalle Berry left us speechless in the lavender Dolce & Gabbana number. Picture: APPieces of a Woman actress Vanessa Kirby wore a beautifully structured corset-gown from Gucci. Picture: APReese Witherspoon was red haute in a Christian Dior halter-neck dress. Picture: APViola Davis in a jaw-dropping Alexander McQueen dress that floored everyone. Picture: APMargot Robbie was a vision in shimmer in a Chanel Haute Couture. Picture: APCarey Mulligan stood out in Valentino.Picture: AP