Throngs of people are descending on the historic town as well-wishers try to catch a glimpse of the royal couple. Thousands of police officers are mounting one of the biggest security operations in recent years.
Crowds Gather for Royal Wedding
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Serena Williams arrives with her husband, Alexis Ohanian, for the wedding ceremony of Prince Harry and Meghan Markle at St. George's Chapel in Windsor Castle in Windsor, near London, England, May 19, 2018.
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A general view of St George's Chapel, Windsor Castle ahead of the wedding of Prince Harry to Meghan Markle at St. George's Chapel, Windsor Castle, May 19, 2018, in Windsor, England.
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Pippa Middleton, left, and her husband James Matthews, right, arrive for the wedding ceremony of Britain's Prince Harry, Duke of Sussex and U.S. actress Meghan Markle at St George's Chapel, Windsor Castle, in Windsor, May 19, 2018.
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Bollywood actress Priyanka Chopra, 2nd left, arrives with other guests to the wedding of Prince Harry and Meghan Markle in Windsor, Britain, May 19, 2018.