LONDON (Reuters) - Buckingham Palace expects record crowds this summer, when 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. In the run-up to the fairytale wedding, details of the outfit were a closely guarded secret, known only to the handful of people who worked on the dress. Hundreds of millions of viewers admired it on television and the internet, and now hundreds of thousands will see it for themselves, unprotected on a raised oval stage in the ornate palace ballroom where state banquets are held. In total a record 643,000 people are expected to take the tour, during which visitors can see 19 state rooms, a display of Faberge jewelry -- and the dress, Middleton's wedding shoes, earrings and a silk replica of her bouquet. The summer opening at Buckingham Palace runs from July 23 to October 3.