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WINDSOR, ENGLAND - APRIL 09: Her Majesty Queen Elizabeth II departs the Service of Prayer and Dedication following the marriage of her son HRH Prince Charles to Camilla Parker Bowles at The Guildhall, at Windsor Castle on April 9, 2005 in Berkshire, England. (Photo by Dave Hogan/Getty Images)

WINDSOR, ENGLAND - APRIL 09:  Her Majesty Queen Elizabeth II departs the Service of Prayer and Dedication following the marriage of her son HRH Prince Charles to Camilla Parker Bowles at The Guildhall, at Windsor Castle on April 9, 2005 in Berkshire, England.  (Photo by Dave Hogan/Getty Images)

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WINDSOR, ENGLAND - APRIL 9: Queen Elizabeth in cream outfit leaves the Service of Prayer and Dedication blessing the marriage of the Prince of Wales, Prince Charles and the Duchess of Cornwall, Camilla Parker-Bowles at Windsor Castle on April 9, 2005 in Berkshire, England. (Photo by Tim Graham Photo Library via Getty Images)

WINDSOR, ENGLAND - APRIL 9:  Queen Elizabeth in cream outfit leaves the Service of Prayer and Dedication blessing the marriage of the Prince of Wales, Prince Charles and the Duchess of Cornwall, Camilla Parker-Bowles at Windsor Castle on April 9, 2005 in Berkshire, England. (Photo by Tim Graham Photo Library via Getty Images)

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WINDSOR, ENGLAND - APRIL 9: Queen Elizabeth II, Prince Philip and the Duke of York sing hymns at the Service of Prayer and Dedication blessing the marriage of TRH the Prince of Wales, Prince Charles, and The Duchess Of Cornwall, Camilla Parker Bowles, at Windsor Castle on April 9, 2005 in Berkshire, England. (Photo by ROTA/Tim Graham Picture Library/Getty Images)

WINDSOR, ENGLAND - APRIL 9: Queen Elizabeth II, Prince Philip and the Duke of York sing hymns at the Service of Prayer and Dedication blessing the marriage of TRH the Prince of Wales, Prince Charles, and The Duchess Of Cornwall, Camilla Parker Bowles, at Windsor Castle on April 9, 2005 in Berkshire, England. (Photo by ROTA/Tim Graham Picture Library/Getty Images)