The Duchess of Cambridge looked stunning in the Lover's Knot Tiara, as she arrived at Buckingham Palace on Wednesday night for the Queen's Diplomatic Reception.
Kate, 37, joined husband Prince William, 37, as they greeted guests at the annual white tie affair, which is one of the highlights of the royal calendar.
They also joined the Queen, 93, Prince Charles, 71, and the Duchess of Cornwall, 72, for the Diplomatic Reception, to greet some of the 1,000 guests in attendance for the lavish event.
The duchess wore a floor length navy velvet Alexander McQueen gown for the occasion, which she paired with sparkling silver drop earrings and one of the Queen's silver necklaces. Read more from The Daily Mail.