In 1941, at the invitation of
Queen Elisabeth, Lilian visited Laeken Castle, where King Leopold III, now a
prisoner of war, was held by the Germans under house arrest. This visit was followed by several others, with the result that Leopold III and Lilian fell in love. Leopold proposed marriage to Lilian in July 1941, but Lilian declined his offer because "Kings only marry princesses," she said. Queen Elisabeth, however, prevailed upon Lilian to accept the King's offer. Lilian agreed to marry the King, but declined the title of queen. Instead, the King gave Lilian the title Princess of Belgium, a.k.a. Princess of
Réthy, with the style
Royal Highness. It was agreed that descendants of the King's new marriage would be titled Prince/Princess of Belgium with the style
Royal Highness but excluded from
succession to the throne. Leopold and Lilian initially planned to hold their official, civil marriage after the end of the war and the liberation of Belgium, but in the meantime, a secret religious marriage ceremony took place on 11 September 1941, in the chapel of Laeken Castle, in the presence of King Leopold's mother Queen Elisabeth, Lilian's father Henri Baels,
Cardinal van Roey (who worked as the
Archbishop of Mechelen and
primate of Belgium) and one of the King's old friends. Lilian was wearing Queen Elisabeth's bridal veil during her wedding. This actually contravened Belgian law, which required that the religious wedding be preceded by the civil one. Although Lilian and Leopold had originally planned to postpone their
civil marriage until the end of the war, Lilian was soon
expecting her first child, necessitating a civil marriage, which took place on 6 December 1941. The civil marriage automatically made Lilian a Belgian princess. Lilian proved a devoted wife to the King and an affectionate and vivacious stepmother to his children by his first wife, Queen Astrid. When the civil marriage of Leopold and Lilian was made public in a pastoral letter by Cardinal van Roey read throughout Belgian churches in December 1941, there was a mixed reaction in Belgium. Some showed sympathy for the new couple, sending flowers and messages of congratulations to the palace at Laeken. One of the leading Belgian newspapers rebuked King Leopold: "Sire, we thought you had your face turned towards us in mourning. Instead you had it hidden in the shoulder of a woman." Queen Astrid's parents,
Prince Carl and
Princess Ingeborg of Sweden, did not take the hard line against King Leopold's remarriage. Princess Ingeborg told a Belgian journalist that she couldn't understand all the animus in Belgium against the king's second marriage, that it was perfectly natural for a young man not to want to remain alone forever. She said she was happy about her son-in-law's new marriage, both for his own sake and for the sake of her grandchildren. ==Deportation to Nazi Germany==