The King's desire to marry a woman who had two living ex-husbands threatened to cause a constitutional crisis in the United Kingdom and the Dominions, and ultimately led to his abdication in December 1936 to marry "the woman I love". After abdicating, the former king was created Duke of Windsor by his brother and successor, King George VI. Wallis married Edward six months later, after which she was formally known as the Duchess of Windsor, but was not allowed to share her husband's style of "Royal Highness".