LONDON, ENGLAND - APRIL 29:  Prince William and Catherine Middleton during their wedding service in Westminster Abbey on April 29, 2011 in London, England. The marriage of the second in line to the British throne is being led by the Archbishop of Canterbury and will be attended by 1900 guests, including foreign Royal family members and heads of state. Thousands of well-wishers from around the world have also flocked to London to witness the spectacle and pageantry of the Royal Wedding. (Photo by Anthony Devlin - WPA Pool/Getty Images)
LUXEMBOURG - OCTOBER 20:  Princess Stephanie of Luxembourg arrives at the wedding ceremony of Prince Guillaume Of Luxembourg and Princess Stephanie of Luxembourg at the Cathedral of our Lady of Luxembourg on October 20, 2012 in Luxembourg, Luxembourg. The 30-year-old hereditary Grand Duke of Luxembourg is the last hereditary Prince in Europe to get married, marrying his 28-year old Belgian Countess bride in a lavish 2-day ceremony.  (Photo by Pascal Le Segretain/Getty Images)
STOCKHOLM, SWEDEN - JUNE 08:  Princess Madeleine of Sweden and Christopher O'Neill 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.  (Photo by Andreas Rentz/Getty Images)