Philippe is King of the Belgians. He is the eldest child of King Albert II and Queen Paola. He succeeded his father upon the former’s abdication for health reasons on 21 July 2013. He married Mathilde d'Udekem d'Acoz in 1999, with whom he has four children. Their eldest child, Princess Elisabeth, is first in the line of succession.

Belgium is a constitutional, hereditary and popular monarchy. The monarch is titled King of the Belgians and serves as the country's head of state and commander-in-chief of the Belgian Armed Forces. There have been seven Belgian monarchs since independence in 1830.