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Crown Prince Guillaume of Luxembourg, Princess Stephanie of Luxembourg and Jean-Claude Juncker attend the Gala dinner for the wedding of Prince Guillaume of Luxembourg and Stephanie de Lannoy at the Grand-ducal Palace, in Luxembourg. (Photo by Stephane Cardinale/Corbis via Getty Images)

Crown Prince Guillaume of Luxembourg, Princess Stephanie of Luxembourg and Jean-Claude Juncker attend the Gala dinner for the wedding of Prince Guillaume of Luxembourg and Stephanie de Lannoy at the Grand-ducal Palace, in Luxembourg. (Photo by Stephane Cardinale/Corbis via Getty Images)