PHOTO: EAST NEWS/AFP (FILES) A file photo dated 29 July 1981 of The Prince and Princess of Wales at Buckingham Palace, after their wedding ceremony at St Paul's Cathedral. Offcut material from this. The spare cuttings of the ivory silk gown wedding dress are expected to fetch at least ??100,000 at auction or in a private sale set to take place within six months, said solicitor Peter Smith.

(FILES) A file picture take on July 29, 1981, shows Britain's Prince Charles (L) and Lady Diana, Princess of Wales, on their wedding day at St Paul's Cathedral in London. Prince Charles said Tuesday November 16, 2010, he was "thrilled" at the engagement of his eldest son Prince William to his long-term girlfriend Kate Middleton, adding: "They have been practising long enough." AFP PHOTO/STR/FILES

The Archbishop of Canterbury, Robert Runcie watches as Prince Charles faces his bride Lady Diana Spencer, during their wedding at St. Paul's Cathedral in London, England on July 29, 1981. (AP Photo)

Lady Diana Spencer and Prince Charles take their vows at the High Altar at St. Paul's Cathedral in London, England on July 29, 1981. (AP Photo)

Lady Diana Spencer waves to crowds of well-wishers from a horse-drawn carriage en route to St. Paul's Cathedral, London, where she will marry Britain's Prince Charles, heir to the throne, July 29, 1981. (AP Photo/Pool)

Prince Charles and his wife Diana, the Princess of Wales, walk down the steps of St. Paul's Cathedral in London July 29, 1981, after their marriage ceremony. (AP Photo/Press Association/Pool)

Prince Charles and his bride Diana, Princess of Wales, are shown on their wedding day on the balcony of Buckingham Palace in London, July 29, 1981. Children are unidentified. (AP Photo)

The carriage carrying the Prince and Princess of Wales passes along Trafalgar Square on its way from St. Paul's Cathedral to Buckingham Palace after the royal wedding in London on July 29, 1981. (AP Photo)

Prince Charles motions to lend a hand to the former Lady Diana Spencer as they enter their carrriage outside St. Paul's Cathedral at the ed of their wedding ceremony in London, July 29, 1981. (AP Photo/Pool)

Lady Diana Spencer in her wedding gown on the steps of St. Paul's Cathedral in London on her way to the wedding ceremony. Person at left is unidentified. (AP Photo/BIPNA, Pool)

Prince Charles and Lady Diana Spencer are shown on their wedding day at St. Paul's Cathedral in London on July 29, 1981. (AP Photo)

Prince Charles and his bride Diana, Princess of Wales, wave from the balcony of Buckingham Palace after their marriage July 29, 1981, at St. Paul's Catheral. (AP Photo)

Prince Charles and his bride Diana, Princess of Wales, march down the aisle of St. Paul's Cathedral at the end of their wedding ceremony on July 29, 1981 in London. (AP Photo)

The carriage carrying the Prince and Princess of Wales passes along Trafalgar Square on its way from St. Paul's Cathedral to Buckingham Palace after the royal wedding in London on July 29, 1981. (AP Photo)

Prince Charles and his bride Diana, Princess of Wales, are shown on their wedding day on the balcony of Buckingham Palace in London, July 29, 1981. (AP Photo)

Newly-wed Prince Charles and the Princess of Wales smile on the steps of St. Paul's Cathedral after their wedding ceremony July 29, 1981. (AP Photo/BIPNA, Pool)

Prince Charles and his bride Diana, Princess of Wales, march down the aisle of St. Paul's Cathedral at the end of their wedding ceremony on July 29, 1981 in London. (AP Photo)

Prince Charles and his bride Diana, Princess of Wales, march down the aisle of St. Paul's Cathedral at the end of their wedding ceremony on July 29, 1981 in London. The bride's maids and the groom's brothers Prince Andrew, top left, and Prince Edwards, top right, march behind them. (AP Photo)

Prince Charles and Lady Diana Spencer are shown on their wedding day at St. Paul's Cathedral in London on July 29, 1981. (AP Photo)

Diana, Princess of Wales, is shown on her wedding day in St. Paul's Cathedral in London on July 29, 1981. (AP Photo)