Happy Birthday to Hereditary Grand Duke Guillaume of Luxembourg, who turns 36 today! The eldest child of Grand Duke Henri and Grand Duchess Maria Theresa, he is the eldest of five children. Born during the reign of his grandfather, Grand Duke Jean, and became Heir to the Grand Duchy in 2000. Educated in Luxembourg, Switzerland, the United Kingdom, and France, Hereditary Grand Duke Guillaume speaks Luxembourgish, French, German, Spanish and English, plays piano, and enjoys football, swimming and volleyball. In 2012, he married Countess Stéphanie de Lannoy in a lavish ceremony in Luxembourg City. The Hereditary Grand Duke and Hereditary Grand Duchess undertake official duties in Luxembourg and represent its interests abroad. I wish HRH a very Happy Birthday and Many Happy Returns!