Prince Guillaume, the Hereditary Grand Duke of Luxembourg;
Credit: © Maison du Grand-Duc / Sophie Margue
The Hereditary Grand Duke of Luxembourg will celebrate his 43rd birthday on Monday 11 November 2024.
Prince Guillaume Jean Joseph Marie of Luxembourg, Prince of Nassau and Bourbon-Parma, eldest son of Luxembourg’s Grand Duke and the Grand Duchess, was born on 11 November 1981 at the Grande-Duchesse Charlotte Maternity Hospital.
On 18 December 2000, Prince Guillaume was sworn in and officially became “Hereditary Grand Duke of Luxembourg”. On 20 October 2012, he married Countess Stéphanie de Lannoy who became the Hereditary Grand Duchess of Luxembourg. Prince Guillaume and Princess Stéphanie are the parents of two boys, Prince Charles Jean Philippe Joseph Marie Guillaume and Prince François Henri Luis Marie Guillaume, born on 10 May 2020 and 27 March 2023 respectively at the Grande-Duchesse Charlotte Maternity Hospital.
Prince Guillaume attended primary school in Lorentzweiler and continued his education at the Lycée Robert Schuman until the fourth year of Luxembourgish secondary education. At the age of 16, he enrolled at the Institut Le Rosey and subsequently at the Collège Alpin Beausoleil in Switzerland, where he obtained his French Baccalaureate in 2001.
He then successfully completed his officer training at the Sandhurst Royal Military Academy in the United Kingdom. He was sworn in as an officer of the Luxembourg Army in December 2002 and currently holds the rank of Colonel.
In 2003, Prince Guillaume completed a traineeship at the Belgian Chemical Union, and In 2004, he did an internship at Deutsche Bank in London. In 2005, he trained at the Spanish branch of steel group Arcelor Mittal. After studying international politics in the United Kingdom, Prince Guillaume continued his studies in France; in 2009, he obtained a double degree in Literature and Political Science with honours at the University of Angers.
In 2018 and 2019, the Hereditary Grand Duke attended a postgraduate training course at the Royal College of Defence Studies (RCDS) in London, where he acquired additional expertise in relation to his future responsibilities as Head of State.
In 2018, the Miami University Dolibois European Center (MUDEC) awarded Prince Guillaume with its highest honorary distinction, the Doctorate honoris causa, for his public and social engagements.
On 8 October 2024, Prince Guillaume, Hereditary Grand Duke of Luxembourg, officially became the Lieutenant-Representative (Lieutenant-Représentant) of the Grand Duke.
