Regal Ralph Lauren

Photo by Charles Dharapak / AP Images

This evening the President and First Lady are hosting a dinner for Queen Elizabeth at the Winfield House, where the U.S. ambassador to the U.K. lives. For the occasion, Mrs. O has chosen an off-the-shoulder black gown by Ralph Lauren paired with absolutely knock-out jewelry by Tom Binns and a jade and diamond lattice ring by Yewn. Stunning!

The gown originates from the Ralph Lauren Fall 2011 collection, seen here. (Thanks BeeGee!)