Crown Prince Frederik of Denmark and Crown Princess Mary of Denmark attend the wedding ceremony of Prince Guillaume of Luxembourg and Princess Stephanie of Luxembourg at the Cathedral of our Lady of Luxembourg, in Luxembourg. (Photo by Stephane Cardinale/Corbis via Getty Images)
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LUXEMBOURG - OCTOBER 20: Crown Princess Mary of Denmark and Crown Crown Prince Frederik of Denmark of Denmark attends 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)
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Getty Images Entertainment Pascal Le Segretain

LUXEMBOURG - OCTOBER 20: Crown Princess Mary of Denmark and Crown Crown Prince Frederik of Denmark of Denmark attends 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)
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Getty Images Entertainment Pascal Le Segretain

LUXEMBOURG - OCTOBER 20: Crown Princess Mary of Denmark and Crown Crown Prince Frederik of Denmark emerge from the Cathedral following 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 Sean Gallup/WireImage)
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