Prince William and Kate Middleton Celebrate 5th Wedding Anniversary—Their Best Moments in Photos

Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge pose for a photograph with their son, Prince George Alexander Louis of Cambridge, surrounded by Lupo, the couple's cocker spaniel, and Tilly the retriever (a Middleton family pet) in the garden of the Middleton family home in August 2013 in Bucklebury, Berkshire. Michael Middleton - WPA Pool/Getty Images

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge sit in front of the Taj Mahal during day seven of the royal tour of India and Bhutan on April 16, 2016 in Agra, India Ian Vogler-Pool/Getty Images

Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge, with their children, Princess Charlotte and Prince George, enjoy a short private skiing break on March 3, 2016 in the French Alps, France. ohn Stillwell - WPA Pool/Getty Images