Kate Middleton Gave Thanks for the Queen in McQueen

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LONDON, UNITED KINGDOM - JUNE 05: Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge leave Westminster Hall after a Diamond Jubilee Luncheon given for The Queen by The Livery Companies of The City of London on June 5, 2012 in London, England. For only the second time in its history the UK celebrates the Diamond Jubilee of a monarch. Her Majesty Queen Elizabeth II celebrates the 60th anniversary of her ascension to the throne today with a carriage procession and a service of thanksgiving at St Paul's Cathedral. (Photo by Peter Byrne - WPA Pool/Getty Images) Photo: WPA Pool/Getty Images

The duchess of Cambridge attended the Service of Thanksgiving at St. Paul's Cathedral and a luncheon at Westminster Hall today as part of the Queen's Diamond Jubilee celebration. And she took a ride in a horse-drawn carriage for the first time since the Royal Wedding! For these fun activities, she wore a lace Alexander McQueen dress, a hat by Jane Taylor, and L.K. Bennett pumps. See her full look in our updated Kate Middleton Look Book.