They married in The Hague on 7 January 1937, the date on which Princess Juliana's grandparents, King William III and Queen Emma, had married fifty-eight years earlier.
Casaron na Haia o 7 de xaneiro de 1937, na mesma data que o fixeran os avós de Xuliana, o rei Guillerme III e a raíña Emma, cincuenta e oito anos antes.