WINDSOR, ENGLAND - MAY 18: Queen Elizabeth II (C) poses for group photo with her Royal guests (front row L - R) Emperor Akihito of Japan, Queen Beatrix of The Netherlands, Queen Margrethe II of Denmark, King Constantine of Greece, King Michael of Romania, HM , Simeon Borisov of Saxe-Coburg and Gotha, Sultan of Brunei Hassanal Bolkiah, King Carl Gustaf XVI of Sweden, HM the King of Swaziland, and Prince Hans-Adam II of Liechtenstein, (middle row L - R) HSH Prince Albert II of Monaco, Grand Duke Henri of Luxembourg,  King Letsie III of Lesotho, King Albert of Belgium, King Harald V of Norway, Emir of the State of Qatar Sheikh Hamad Bin Khalifa Al-Thani, King Abdallah II of Jordan, King of Bahrain Hamad ibn Isa Al Khalifa, The Yang di-Pertuan Agong of Malaysia, (top row, L - R) Nasser Mohamed Al-Jaber Al-Sabah of Kuwait, Crown Prince of Abu Dhabi, HRH the Crown Prince Alexander II of Yugoslavia, King George Tupou V of Tong, Crown Prince Vajiralongkorn of Tahiland,  Princess Lalla Meryem of Morocco and HRH Prince Mohammed bin Nawaf bin Abdulaziz Al Saud of Saudi Arabia before her Sovereign Monarch's Jubilee lunch, in the Grand reception room at Windsor Castle on May 18, 2012 in Windsor, England. (Photo by John Stillwell - WPA Pool/Getty Images)