heir apparent to the Belgian throne, eldest child of King Albert II and Queen Paola.

Philippe was the first of three children of Albert II, who became Belgium's sixth king in 1993. He received his early education in both Flemish and French, after which he attended the Royal Military Academy and studied abroad at Trinity College, Oxford, and at Stanford University, where he earned his master's degree (1985) in political science. He trained as a pilot and paratrooper and held the rank of colonel in both the Belgian army and air force and of captain in the Belgian navy. It had been expected in 1993, upon the death of King Baudouin I, that Albert would abdicate in favour of Philippe, but Albert elected to take the throne, and some speculated that Philippe, then 33 and unmarried, was not yet prepared to lead the country. Philippe was appointed honorary chairman of the Belgian Foreign Trade Board in 1993 and in that capacity conducted numerous visits abroad. From 1993 he also served as chairman of the National (now Federal) Council for Sustainable Development. In June 1994 he became a member of the Belgian Senate.

In September 1999 Philippe announced his engagement to Mathilde d'Udekem d'Acoz (Mathilde, princess of Belgium). Although the two had been a couple for several years, both their relationship and the details of their first meeting were kept from the press. Mathilde proved to be wildly popular with the Belgian public, and her ability to speak both French and Flemish (as well as English and Italian) bridged the political and cultural differences that separated the regions of Wallonia and Flanders. Their wedding on Dec. 4, 1999, united the country and drew comparisons to the storybook wedding of Britain's Prince Charles (Charles, prince of Wales) and Lady Diana Spencer (Diana, princess of Wales). Since 2004 Philippe has served as an honorary chairman for the European chapter of the Club of Rome, a political and economic think tank.