Willem-Alexander ( Willem-Alexander Claus George Ferdinand; born 27 April 1967) is the King of the Netherlands, including the Netherlands proper (with the Caribbean Netherlands), and the countries of Curaçao, Aruba, and Sint Maarten. He is head of the Dutch royal house and the House of Amsberg.
Willem-Alexander was born in Utrecht and is the oldest child of Princess Beatrix and German diplomat Claus van Amsberg. He became Prince of Orange and heir apparent to the throne of the Netherlands on 30 April 1980, when his mother became queen regnant, and he ascended the throne on 30 April 2013 when his motherabdicated.
He went to public primary and secondary schools, served in the Royal Netherlands Navy, and studied history at Leiden University. He married Máxima Zorreguieta Cerrutiin 2002 and they have three daughters: Catharina-Amalia, Princess of Orange (born 2003), Princess Alexia (born 2005), and Princess Ariane (born 2007).
Willem-Alexander is interested in sports and international water management issues. Until his accession to the throne, he was a member of the International Olympic Committee (1998–2013), chairman of the Advisory Committee on Water to the Dutch Minister of Infrastructure and the Environment (2004–2013), and chairman of the Secretary-General of the United Nations' Advisory Board on Water and Sanitation (2006–2013). At the age of forty-eight, he is currently the second youngest monarch in Europe after Felipe VI of Spain.