LONDON, UNITED KINGDOM - JUNE 04: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge attend a service of celebration to mark the 60th anniversary of the Coronation of Queen Elizabeth II at Westminster Abbey on June 4, 2013 in London, England. The Queen's Coronation took place on June 2, 1953 after a period of mourning for her father King George VI, following her ascension to the throne on February 6, 1952. The event 60 years ago was the first time a coronation was televised for the public.
LONDON - NOVEMBER 28: Camilla, Duchess of Conrwall and Prince Charles, Prince of Wales attend the Royal film performance of Hugo in 3D at The Odeon Leicester Square on November 28, 2011 in London, United Kingdom.
ALNWICK, UNITED KINGDOM - JUNE 22: Prince Harry attends the wedding of Melissa Percy and Thomas Staubenzee at Alnwick Castle on June 22, 2013 in Alnwick, England.
MONACO - JULY 02: Princess Sirivannavari Nariratana of Thailand attends the religious ceremony of the Royal Wedding of Prince Albert II of Monaco to Princess Charlene of Monaco in the main courtyard at the Prince's Palace on July 2, 2011 in Monaco. The Roman-Catholic ceremony follows the civil wedding which was held in the Throne Room of the Prince's Palace of Monaco on July 1. With her marriage to the head of state of the Principality of Monaco, Charlene Wittstock has become Princess consort of Monaco and gains the title, Princess Charlene of Monaco. Celebrations including concerts and firework displays are being held across several days, attended by a guest list of global celebrities and heads of state.
AMSTERDAM, NETHERLANDS - APRIL 30: Crown Prince Naruhito, and Crown Princess Masako of Japan during the inauguration ceremony of King Willem Alexander and Queen Maxima of the Netherlands at New Church on April 30, 2013 in Amsterdam, Netherlands.
AGADIR, MOROCCO - MARCH 27: HRH Prince Moulay Rachid speaks with Francesco Molinari of Italy during the Pro-Am of the Trophee du Hassan II Golf at Golf du Palais Royal on March 27, 2013 in Agadir, Morocco.
RASCAFRIA, SPAIN - JULY 10: Prince Felipe of Spain and Princess Letizia of Spain visit Guadarrama National Park on July 10, 2013 in Rascafria, Spain.
AMSTERDAM, NETHERLANDS - APRIL 30: Crown Prince Maha Vajiralongkorn of Thailand and his sister Princess Maha Chakri Sirindhorn of Thailand arrive at the Nieuwe Kerk in Amsterdam for the inauguration ceremony of King Willem Alexander of the Netherlands, on April 30, 2013 in Amsterdam, Netherlands.
MONTE-CARLO, MONACO - MARCH 23: Princess Charlene of Monaco and Prince Albert II of Monaco attend the 'Bal De La Rose Du Rocher' in aid of the Fondation Princess Grace on the 150th Anniversary of the SBM at Sporting Monte-Carlo on March 23, 2013 in Monte-Carlo, Monaco.
STOCKHOLM, SWEDEN - JUNE 08: Princess Marie of Denmark and Prince Joachim of Denmark attend the wedding of Princess Madeleine of Sweden and Christopher O'Neill hosted by King Carl Gustaf XIV and Queen Silvia at The Royal Palace on June 8, 2013 in Stockholm, Sweden.
STOCKHOLM, SWEDEN - JUNE 08: Crown Prince Frederik of Denmark and Crown Princess Mary of Denmark attend the wedding of Princess Madeleine of Sweden and Christopher O'Neill hosted by King Carl Gustaf and Queen Silvia at The Royal Palace on June 8, 2013 in Stockholm, Sweden.
BRUSSELS, BELGIUM - JULY 12: Prince Philippe and Princess Mathilde of Belgium receive Regional Ministers at Laeken Castle on July 12, 2013 in Brussels, Belgium.
JEDDAH, SAUDI ARABIA - JUNE 20: Crown Prince Salman bin Abdulaziz is seen during a condolence call made by US Secretary of Defense Leon Panetta, unseen, at the Royal Court June 20, 2012 in Jeddah, Saudi Arabia. Panetta is leading a Presidential Delegation to Jeddah, Saudi Arabia to attend the memorial service for Prince Nayef bin Abbel-Aziz.
PARIS, FRANCE - FEBRUARY 05: Saudi Prince Salman Bin Abdulaziz Bin Salman Al-Saud attends the 8th Annual Dinner of the 'Societe Des Amis Du Musee D'Art Moderne' at Centre Pompidou on February 5, 2013 in Paris, France.
STOCKHOLM, SWEDEN - JUNE 08: Princess Anna of Bavaria and Prince Manuel of Bavaria attend the wedding of Princess Madeleine of Sweden and Christopher O'Neill hosted by King Carl Gustaf XIV and Queen Silvia at The Royal Palace on June 8, 2013 in Stockholm, Sweden.
LONDON, ENGLAND - JULY 08: Princess Beatrice of York attends the Novak Djokovic Foundation inaugural London gala dinner at The Roundhouse on July 8, 2013 in London, England. The foundation supports vulnerable and disadvantaged children, especially in Djokovic's native Serbia.
PARIS, FRANCE - DECEMBER 01: Princess Caroline of Hanover attends the awards cerenomy of the Style & Competition for Amade during the Gucci Paris Masters 2012 at Paris Nord Villepinte on December 1, 2012 in Paris, France.
MONTE-CARLO, MONACO - MAY 21: Princess Charlotte Casiraghi and Prince Andrea Casiraghi pose for the photographers before the World Stars Football Match, Star Team Monaco vs Formula one drivers team at Louis II Stadium on May 21, 2013 in Monte-Carlo, Monaco.
BORGHOLM, SWEDEN - JULY 14: Crown Princess Victoria, and Prince Daniel of Sweden, and King Carl Gustaf of Sweden ( R ) attend The Victoria Day Concert in Borgholm, on the Crown Princess's 36th Birthday on July 14, 2013 in Borgholm, Sweden.
STOCKHOLM, SWEDEN - JUNE 08: Prince Edward, Earl of Wessex and Sophie, Countess of Wessex depart from the wedding ceremony of Princess Madeleine of Sweden and Christopher O'Neill hosted by King Carl Gustaf XIV and Queen Silvia at The Royal Palace on June 8, 2013 in Stockholm, Sweden.
NUREMBERG, GERMANY - MAY 26: Royal Highness Prince Georg Friedrich Ferdinand von Preussen and wife Sophie Princess von Preussen attend the reception after the wedding ceremony of Melissa Countess Faber-Castell (born Eliyesil) and Charles Alexander Count Faber-Castell at Stein Castle on May 26, 2012 in the vicinity of Nurenberg, Germany.
MONTE-CARLO, MONACO - MAY 23: Pierre Casiraghi visits Team Ferari at the Monte Carlo Grand Prix race circuit on May 23, 2013 in Monte-Carlo, Monaco.
Prince Rainier of Monaco and his wife Princess Grace (1929 - 1982) take the sun outside their hotel in Lausanne during a springtime holiday in Switzerland, 14th March 1957.
UNITED KINGDOM - DECEMBER 01: Prince Charles, Prince of Wales and Diana, Princess of Wales at home in Kensington Palace with their sons Prince William and Prince Harry