He's young, down to earth, and always has a cheeky smile on his face.
Along with his gorgeous wife Kate Middleton, Prince William has brought the royal family straight into the 21st century - no wonder he's one of our fave royals.
But first things first! As Prince Wills turns 30 we've made a princely quiz in honor of the occasion.
Find out how much you really know about this handsome royal in our Prince William quiz.