Prince William and Kate Middleton celebrate their third anniversary on 29th April Let's take a look back at the three splendid years of togetherness for the royal couple of the Duke and Duchess of Cambridge. It was three years ago that the Prince William tied the knot with Kate Middleton is the most watched event on the planet. Around 2,000 friends, family and dignitaries came to Westminster Abbey for the wedding ceremony that was the talk around the world. Since then this has been the most followed couple in the world by global media and millions of people around the world.