The wedding of Prince Edward, Duke of Windsor, and Wallis Simpson took place on Thursday 3 June 1937 at Château de Candé in France. The bride was a twice-divorced American socialite whose relationship with the groom, formerly King Edward VIII, caused a constitutional crisis which led to his abdication in December 1936.

During her marriage to Ernest Aldrich Simpson, Wallis Simpson was introduced to Edward, then-Prince of Wales, by his then-mistress Thelma, Viscountess Furness. On January 10, 1931, Lady Furness introduced Wallis to Edward at Burrough Court, near Melton Mowbray. Soon, the pair began a relationship. Between 1931 and 1934, he met the Simpsons at various house parties, and Wallis was presented at court.

On January 20, 1936, George V died at Sandringham and Edward ascended the throne as Edward VIII. The next day, he broke royal protocol by watching the proclamation of his accession from a window of St James's Palace, in the company of the still-married Wallis. It was becoming apparent to court and government circles that the new king meant to marry her.

As King of the United Kingdom, Edward was also Supreme Governor of the Church of England. At the time of the proposed marriage (and until 2002), the Church of England disapproved of, and would not perform, the remarriage of divorced people if their former spouse was still alive. Constitutionally, the King was required to be in communion with the Church of England, but his proposed marriage conflicted with the Church's teachings. In November, he consulted with the British prime minister, Stanley Baldwin, on a way to marry Wallis and keep the throne. However, the British and Dominion governments believed that a twice-divorced woman was politically, socially, and morally unsuitable as a prospective consort. Hence, if Edward were to marry Wallis against Baldwin's advice, the government would be required to resign, causing a constitutional crisis.

Wallis's relationship with Edward had become public knowledge in the United Kingdom by early December. She decided to flee the country as the scandal broke, and was driven to the south of France where she stayed at the Villa Lou Viei, near Cannes, the home of her close friends Herman and Katherine Rogers. Determined to marry Wallis, Edward decided he had no option but to abdicate.

Edward signed the Instrument of Abdication on December 10, 1936, in the presence of his three surviving brothers, the Dukes of York, Gloucester and Kent. The Duke of York then became King George VI. On December 11, Edward said in a radio broadcast, "I have found it impossible to carry the heavy burden of responsibility, and to discharge my duties as King as I would wish to do, without the help and support of the woman I love."

Edward left Britain for Austria, where he stayed at Schloss Enzesfeld, the home of Baron Eugène and Baroness Kitty de Rothschild. Edward had to remain apart from Wallis until there was no danger of compromising the granting of a decree absolute in her divorce proceedings. Upon her divorce being made final in May 1937, she changed her name by deed poll to Wallis Warfield, resuming her maiden name. The couple reunited in France soon after for their wedding.

Wallis and Edward married on June 3, 1937, at the Château de Candé, lent to them by French millionaire Charles Bedaux. The date would have been King George V's 72nd birthday; Queen Mary thought the wedding had been scheduled for then as a deliberate slight. No member of Edward's family attended.