Buckingham Palace announced in December 2012 that Prince William, the Duke of Cambridge, and Catherine, the Duchess of Cambridge, were expecting their first child. While the couple has tried to keep mum about the details, speculation grew about everything from Kate's maternity wardrobe, to palace preparations, to baby names. After a change in the monarchy's rules, the couple's firstborn will be the heir to the British throne, regardless of the baby's gender. With the arrival of the royal couple's bundle of joy, here's a look back at William and Kate's romance.