Plan to bare your good-looking back at your upcoming prom? You're sure to love these sexy and seductive open-back prom dresses from uk.millybridal.org. Open back dresses and evening gowns with keyhole back are a red carpet favourite this year. Look chic and sexy from every angle at your prom with an open back dress from uk.millybridal.org. Shop daring low cut evening gowns and sexy keyhole back dresses for your prom, homecoming or any formal occasion.