On 30 April 2013, King Willem-Alexander succeeded his mother as monarch. The King is married to Queen Máxima. The royal couple have three daughters, Princess Catharina-Amalia (the Princess of Orange), Princess Alexia and Princess Ariane.
Willem-Alexander Claus George Ferdinand was born in the University Hospital, Utrecht, on 27 April 1967, the first child of Princess Beatrix and Prince Claus.

At birth, King Willem-Alexander received the titles of Prince of the Netherlands and Prince of Orange-Nassau, Jonkheer van Amsberg. He was baptised in The Hague on 2 September 1967. His godparents were Prince Bernhard, Queen Margrethe of Denmark, Ferdinand von Bismarck, former Prime Minister Jelle Zijlstra and Ms Renée Smith-Roëll.

King Willem-Alexander spent his early childhood at Drakensteyn Castle in Lage Vuursche. He has two brothers, Prince Friso (1968-2013), and Prince Constantijn (1969). In 1981 the family moved from Drakensteyn Castle to Huis ten Bosch Palace in The Hague.
On 30 March 2001 Princess (then Queen) Beatrix and Prince Claus announced the engagement of the Prince of Orange and Máxima Zorreguieta. On 3 July 2001 the two houses of parliament passed a bill submitted by the government consenting to the marriage. The Mayor of Amsterdam, Job Cohen, conducted the civil marriage ceremony in the Beurs van Berlage on 2 February 2002. The church ceremony took place immediately afterwards at the Nieuwe Kerk, Amsterdam. The Reverend Carel ter Linden and Father Rafael Braun officiated.

The royal couple initially lived at Noordeinde 66, The Hague. In spring 2003, they moved to Eikenhorst on the De Horsten estate in Wassenaar.

Their first child, Princess Catharina-Amalia, the current Princess of Orange, was born on 7 December 2003. Their second child, Princess Alexia, was born on 26 June 2005, and their third child, Princess Ariane, on 10 April 2007. All three were born at Bronovo Hospital in The Hague.