section_path: Hereditary Grand Duke
section_name: Hereditary Grand Duke
paragraph_text: Hereditary Grand Duke
  
  Guillaume has been heir apparent to the crown of Luxembourg since his father's accession in 2000.
  
  Guillaume became the honorary chairman of the Board of Economic Development of the Grand Duchy of Luxembourg, an agency for economic promotion and development, in March 2001. He has also been a member of the Council of State since 24 June 2005. He attended the Millennium Conference at the United Nations headquarters in New York City in 2005. Prince Guillaume also worked at the European Commission and the Permanent Representation of Luxembourg to the European Union in Brussels in 2012.
  
  The Hereditary Grand Duke is patron of the Luxembourg Cycling Sport Federation, Youth Hostels Central, National Association of Road Victims, Chamber Orchestra of Luxembourg, Youth Harmony Orchestra of the European Union, as well as to Young Entrepreneurs Luxembourg and Special Olympics Luxembourg Associations.
  
  During the summer of 1997, Guillaume participated as a member of Luxembourg Scout Movement in a humanitarian camp in Nepal. He was involved in a reforestation project and other actions for the benefit of less fortunate communities. In 2017, the Hereditary Grand Duke joined the board of directors of the World Scout Foundation to support the development of scouting around the world.
  
  In 1999, he participated in a charitable mission in Aguascalientes to provide the educational and social assistance to young people in one of the most deprived areas in Mexico. After having chaired the Kräizbierg Foundation, which works for people with disabilities, for more than 10 years (2000–2011), the Hereditary Grand Duke accepted the title of honorary president in March 2011.
  
  Since 18 January 2016, the Hereditary Grand Duke has been a member of the board of directors of Europäische Stiftung Kaiserdom zu Speyer Foundation. He is also a member of the board of directors of the Fondation du Grand-Duc et de la Grande-Duchesse.
  
  On 8 October 2024, as had been announced by Grand Duke Henri on his Official Birthday that year, Prince Guillaume was appointed as lieutenant representative (regent). Under this capacity, he assumed a number of his father's constitutional powers, such as the swearing in of ambassadors and the signing of Grand Ducal Decrees. This is traditionally the first step in the abdication process in Luxembourg. On 24 December 2024, during his Christmas message, Henri announced that the abdication would take place on 3 October 2025. On his accession to the throne, Guillaume will reign as Guillaume V (English: William V).