EMBARGOED UNTIL GMT 2301 July 21, 2011. The wedding dress of Britain's Catherine, Duchess of Cambridge is seen as it is prepared for display at Buckingham Palace in London July 20, 2011. Buckingham Palace expects record crowds this summer as up to 650,000 people are set to file into Queen Elizabeth's London residence and past the dress worn by Kate Middleton at her royal wedding to Prince William. The ivory and white garment, designed by Sarah Burton for Alexander McQueen, won over the fashion press and public when Middleton, now the Duchess of Cambridge and a future queen, walked up the aisle of Westminster Abbey in April. Picture taken July 20, 2011. REUTERS/Lewis Whyld/Pool (BRITAIN - Tags: ROYALS TRAVEL SOCIETY ENTERTAINMENT) TEMPLATE OUT