This illustration shows the wedding of Queen Victoria and Prince Albert in the Chapel Royal at St. James's Palace in England on Feb. 10, 1840. Queen Victoria's white ballgown changed the way brides dressed for years to come. AP/File
Princess Victoria Mary of Teck (later Duchess of York and then Queen Mary) is pictured in her wedding dress before her marriage to Prince George, Duke of York (later King George V), on July 6, 1893 at the Chapel Royal, St. James's Palace, in London. Newscom/File
Elizabeth, Duchess of York, with Prince Albert, Duke of York, on their wedding day, April 26, 1923. The movie 'The King's Speech' documents part of their lives together. Newscom/File
Princess Elizabeth and the Duke of Edinburgh are pictured on their wedding day, November 20, 1947. The princess married her third cousin, Prince Philip of Greece and Denmark, who gave up his Greek and Danish titles to become a British subject. Before the wedding, Elizabeth's father King George VI gave him the title Duke of Edinburgh. Fox/Sipa/Newscom/File
Princess Margaret and Antony Amstrong-Jones pose on the balcony of Buckingham Palace after returning from Westminister Abbey after their wedding ceremony on May 6, 1960. It was the first royal wedding to be broadcast on television. NJC-Topix/Newscom/File
An overhead view of Prince Edward, the Duke of Kent, and his bride, the former Miss Katharine Worsley, as they make their way along the great nave of York Minster after their wedding on June 8, 1961. Following them are the pages and bridesmaids, with Princess Anne and Miss Sandra Butter bringing up the rear. Newscom/File
Diana, Princess of Wales, wearing an Emanuel wedding dress, and Prince Charles leave St. Paul's Cathedral following their wedding on July 29, 1981. Anwar Hussein/WENN.com/Newscom/File
Prince Andrew and his bride Sarah Ferguson leave their wedding ceremony at Westminster Abbey on July 23, 1986. Anwar Hussein/Empics Entertainment/ABACAUSA.COM/Newscom/File
Prince Edward and Sophie Rhys-Jones leave St. George's Chapel at Windsor Castle after their wedding on June 19, 1999. Newscom/File
HRH Prince Charles and Camilla Parker Bowles are pictured at their wedding at Windsor, Guildhall, on April 9, 2005. Harry Page/Newscom/File
Peter Phillips and Autumn Kelly leave St. George's Chapel in Windsor, England, on May 17, 2008, after their marriage vows. The bride recently converted from Roman Catholicism to Anglicanism so that her husband, son of the Princess Royal, Princess Anne, will not have to renounce his right of royal succession. Sang Tan /AFP/Newscom/File
Iran and five world powers agreed last week to extend by four months a deadline for reaching a final deal aimed at preventing Iran from acquiring a nuclear bomb. But a yawning gulf still has to be bridged.
Though diplomats from Iran and six world powers are talking up the “substantial progress” that led to an extension of nuclear talks until November, crucial differences still threaten a final deal to ensure Iran can never produce a bomb.