March 14, 2012

President Barack Obama and first lady Michelle Obama stand alongside British Prime Minister David Cameron and his wife, Samantha Cameron, as they arrive for a state dinner at the White House in Washington on March 14, 2012.

Mrs. Obama wore a teal, off-the-shoulder gown by Marchesa, paired with a chunky, multi-strand silver, turquoise and teal necklace by Tom Binns.

Credit: SAUL LOEB/AFP/Getty Images