LONDON, ENGLAND - APRIL 29:  Henri, Grand Duke of Luxembourg (L) and Maria Teresa, Grand Duchess of Luxembourg arrive to attend the Royal Wedding of Prince William to Catherine Middleton at Westminster Abbey on April 29, 2011 in London, England. The marriage of the second in line to the British throne is to be 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 Chris Jackson/Getty Images)
LONDON, ENGLAND - APRIL 29:  Henri, Grand Duke of Luxembourg (L) and Maria Teresa, Grand Duchess of Luxembourg  arrive to attend the Royal Wedding of Prince William to Catherine Middleton at Westminster Abbey on April 29, 2011 in London, England.  The marriage of the second in line to the British throne is to be 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 Ian Gavan/GP/Getty Images)
LONDON, ENGLAND - APRIL 29:  Grand Duke Henri and Grand Duchess Maria Teresa of Luxembourg leave Westminster Abbey following the Royal Wedding of Prince William to Catherine Middleton on April 29, 2011 in London, England. The marriage of the second in line to the British throne was led by the Archbishop of Canterbury and was 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 Georges De Keerle/GP/Getty Images)
LONDON, ENGLAND - APRIL 29:  Maria Teresa, Grand Duchess of Luxembourg exits following the marriage of Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge at Westminster Abbey on April 29, 2011 in London, England. The marriage of the second in line to the British throne was led by the Archbishop of Canterbury and was 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 Chris Jackson/Getty Images)