Over the past 36 years, we've watched Prince William grow up from a dashing young royal [1] to a doting father of three [2]. To celebrate his birthday on June 21, we're looking back at some of his best moments in the spotlight, including his royal wedding to Kate Middleton [3], and the births of his children, Prince George, Princess Charlotte, and Prince Louis. Plus, who can forget all of the adorable brotherly moments [4] he's shared with Prince Harry? Keep scrolling for Will's most memorable royal moments ahead.