Kate Middleton looked right at home mingling with sovereign monarchs and heads of state during Queen Elizabeth II's diamond jubilee lunch at Windsor Castle Friday.
While sipping on white wine, Middleton and her husband exchanged pleasantries with Prince Albert II, 54, and his wife, Princes Charlene of Monaco, 34. Like the Duke and Duchess of Cambridge, Albert and Charlene tied the knot in 2011.
Queen Elizabeth II, 86, invited royals from 26 countries to partake in the celebration, including Princesses Beatrice and Eugenie, the Queen of Denmark, the Emperor of Japan, the King of Jordan, the Grand Duke of Luxembourg, the King of Norway, the Crown Prince of Thailand and the King of Swaziland, among others; Queen Sofia of Spain declined to attend the lunch at the behest of her country's government, reportedly due to Prince Edward's upcoming visit to the British territory of Gibralter.
Guests at Friday's lunch feasted on English asparagus tartlet, Windsor lamb and Kent strawberries with Vanilla Charlotte. Prince Charles and his wife, Camilla, Duchess of Cornwall, will host a dinner for the visiting sovereigns at Buckingham Palace Friday evening.