Prince Louis of Luxembourg and Princess Tessy of Luxembourg during the wedding ceremony of Prince Guillaume Of Luxembourg and Countess Stephanie de Lannoy 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 Europa Press/Europa Press via Getty Images)
