Foreign Royal Guests joined the British Royal Family for a Gala without the bride and groom at the Mandarin Oriental Hotel in London on this day in 2011, 15 years ago, on the eve of the Wedding of Prince William of Wales and Catherine Middleton!
Five Kings and Eight Queens were among the Royal Guests as Lady Elizabeth Anson held a Gala for Foreign Royal Guests and the British Royal Family at the Mandarin Oriental Hotel in London, on the eve of the Wedding of Prince William and Catherine Middleton, through the bride and groom were not present.
The Queen and Duke of Edinburgh
The Prince of Wales and Duchess of Cornwall
Queen Margrethe II of Denmark (wearing her Antique Diamond Earrings and Queen Josefina’s Diamond Brooches)
King Harald V and Queen Sonja of Norway (seeing Queen Maud’s Drapers’ Company Brooch and her Diamond Filigree Brooch)
Queen Sofia of Spain with the Prince and Princess of Asturias
Grand Duke Henri and Grand Duchess Maria Teresa of Luxembourg (in Princess Ingeborg’s Pearl Brooch)
The Yang di Pertain Agong and Raja Permaisuri Agong of Malaysia
Sultan Hassanal Bolkiah and Queen Saleha of Brunei
King Constantine II and Queen Anne-Marie of Greece (wearing her Diamond Pendant)
Prince Albert II and Princess Charlene of Monaco
Crown Princess Victoria and Prince Daniel of Sweden
The Duke of Brabant and Princess Mathilde of Belgium (wearing Queen Fabiola’s Waterfall Brooch)
Crown Prince Alexander and Crown Princess Katherine of Serbia (in her Diamond Chain-Link Suite)
Crown Prince Pavlos and Crown Princess Marie-Chantal of Greece
Prince Nikolaos and Princess Tatiana of Greece
The King and Queen of Swaziland
The Princess Royal (in Empress Maria Feodorovna’s Sapphire Choker) and Sir Timothy Laurence
The Earl and Countess of Wessex
The Duke and Duchess of Gloucester (wearing the Gloucester Pearl and Emerald Suite)
The Duke and Duchess of Kent (in her Diamond Flower Suite)
Princess Alexandra of Kent (wearing Grand Duchess Elena Vladimirovna’s Emerald Choker)
Prince and Princess Michael of Kent
Meanwhile, Catherine Middleton spent the evening with her parents and family at the Goring Hotel in London, while Prince William and Prince Harry were at Clarence House, making a surprise appearance to greet well-wishers who had lined the processional route.
Queen Victoria’s Oriental Circlet Tiara
Queen Mary’s Lover’s Knot Tiara
King George VI Festoon Necklace
The Queen’s Japanese Pearl Choker
The Nizam of Hyderabad Necklace
The Greville Ruby and Diamond Floral Bandeau Necklace
Queen Mary’s Art Deco Emerald Choker
Queen Alexandra’s Wedding Necklace
Van Cleef & Arpels Alhambra Suite
Greville Diamond Chandelier Earrings 
Queen’s Silver Jubilee Earrings
Princess Diana’s Sapphire Earrings
The Prince of Wales Feathers Brooch
