Louis I, Grand Duke of Hesse
In 1776, he became engaged to Sophie Dorothea of Württemberg, eldest daughter of Frederick II Eugene, Duke of Württemberg. The engagement was broken off so that Sophia Dorothea could marry Louis's recently widowed brother-in-law Tsarevich Paul Petrovich, son and heir of Catherine II "the Great", Empress of Russia. He received a monetary compensation when the engagement was broken.
Queen Sofía of Spain
The couple married on 14 May 1962, at the Catholic Cathedral of Saint Dionysius in Athens. The bride's gown was made by Jean Dessès and she was attended by her sister Princess Irene of Greece and Denmark, the groom's sister Infanta Pilar of Spain, and Sofía's future sister-in-law Princess Anne-Marie of Denmark (later Queen of Greece), along with Princess Irene of the Netherlands, Princess Alexandra of Kent, Princess Benedikte of Denmark, Princess Anne of Orléans and Princess Tatiana Radziwill.