It was a busy end of summer for Prince William and Princess Kate. In late August, the royal couple returned home to Forest Lodge after their annual family trip to Balmoral Castle in Scotland with their children, Prince George, 13, Princess Charlotte, 11, and Prince Louis, 8. Then it was time to gear up for back-to-school season, which included dropping their oldest off at Eton College. Amid the hustle and bustle, William's estranged brother, Prince Harry, made an unexpected move back to England from the U.S. with his wife, Meghan Markle, and their two kids, Prince Archie, 7, and Princess Lilibet, 5.