The state dinner festivities have begun! First Lady Mrs. O looks elegant in an off-the-shoulder blue Marchesa gown, accessorized with strands of Tom Binns pearls.
Of note, this is the first time that Mrs. O has worn Marchesa for a major event. Marchesa is a New York-based label started by British born designers Georgina Chapman and Keren Craig in 2004. A very clever choice by the First Lady!
Update: By request, a photo of Jill Biden in a strapless, white chiffon gown. Samantha Cameron wears a lace gown by Alessandra Rich.