Prince Guillaume of Luxembourg is the eldest son of Grand Duke Henri and Grand Duchess Maria Teresa of Luxembourg. Born on November 1, 1981, he holds the title of Hereditary Grand Duke. He is involved in various charitable activities and represents Luxembourg at official events. Guillaume studied at Georgetown University and the University of Oxford, focusing on international relations. He is married to Countess Stéphanie de Lannoy, and they have two children. As the future Grand Duke, he plays a significant role in the country's monarchy and public life.