Prince Guillaume, Hereditary Grand Duke of Luxembourg (given names: Guillaume Jean Joseph Marie; born 11 November 1981), has been heir apparent to the crown of Luxembourg since his father’s accession in 2000.
Prince Guillaume was born at the Grand Duchess Charlotte Maternity Hospital in Luxembourg and is the eldest child of Grand Duke Henri of Luxembourg and his wife, Cuban-born Grand Duchess Maria Teresa. He was named after his father’s youngest brother Prince Guillaume of Luxembourg. Guillaume has four younger siblings: Prince Félix, Prince Louis, Princess Alexandra and Prince Sébastien. His godparents are Princess Marie-Astrid of Luxembourg and Prince Guillaume of Luxembourg. Guillaume himself is godparent to his youngest brother Prince Sébastien, his cousin, Prince Paul Louis of Nassau, Prince Emmanuel of Belgium, Princess Ariane of the Netherlands and his nephew, Prince Noah of Nassau.
Guillaume’s education includes Lycée Robert-Schumann in Luxembourg; Collège Alpin International Beau Soleil and Institut Le Rosey boarding schools in Switzerland; and Royal Military Academy Sandhurst, Camberley, England. He began his higher education studies in the United Kingdom where he studied at University College, Durham and Brunel University, both in England. In 2006 he entered Institut Philanthropos in Fribourg, Switzerland, where he spent a year studying philosophy and anthropology. He later studied letters and political science at the Institut Albert-le-Grand in Angers, receiving his bachelor’s degree with honors in 2009. His degree was issued by Université d’Angers, as a result of a partnership agreement between the two schools.
Guillaume has been heir apparent to the crown of Luxembourg since his father’s accession in 2000. If he succeeds to the grand ducal throne, he will reign as the fifth of his name, Guillaume V. His duties include Honorary Chairman of the Board of Economic Development of Luxembourg since 2001. He was formerly active with the Kraizberg Foundation, a charitable institution for the disabled.
At the occasion of his 30th birthday, he gave interviews during which stated that he was in a relationship with a “dear miss” that had been going strong for more than a year but insisted that they need some more time to evaluate their possible future. On 26 April 2012, the court announced the engagement of the Hereditary Grand Duke to the Belgian Countess Stéphanie de Lannoy. The civil wedding took place on Friday, 19 October 2012; the religious wedding took place on Saturday, 20 October 2012.
Guillaume is interested in music and sports; he plays piano and enjoys football, swimming and volleyball. He speaks Luxembourgish, French, German, Spanish and English. He regularly represents his parents in many foreign activities.
Guillaume and Stéphanie share a common descent from Charles Marie, Prince & 5th Duke d’Arenberg, which means that Guillame’s father and Stéphanie are 7th cousins; thus Guillaume is Stéphanie’s 7th cousin once removed.