Kate arrived at the diplomatic reception hosted by the Queen at Buckingham Palace alongside her husband in a chauffeur – driven Bentley.
It is the largest – and one of the most glittering – annual receptions the monarch holds at Buckingham Palace. This lavish party is for the 172 foreign missions in Britain where members of the Royal Family make a point to meet and greet each one.
The Duchess of Cambridge dazzled in a bespoke white, lace Alexander McQueen evening dress, a diamond tiara and diamond chandelier earrings (last seen at the BAFTA dinner during the 2011 North American Tour).
It is thought that this is the first time since her wedding that Kate has worn a tiara.
Wearing a tiara is obligatory at state banquets and last night, and the Duchess donned the Lotus Flower Tiara, also, on loan from the Queen.
The delicate diamond tiara is also known as the Papyrus Tiara. It was made from a necklace the Queen Mother received as wedding gift in 1923 from her husband George VI.
The Queen Mother decided to have it dismantled by Garrard Jewelers and made into the tiara we see today. It features lotus or papyrus – shaped mounts framed in scrolls, with diamonds arranged in arcs and pearl accents.