Popsugar Celebrity And Entertainment Prince William Prince William and Prince Harry Through the Years Prince William and Prince Harry's Cutest Moments Together Through the Years 21 June, 2016 by Laura Marie Meyers View On One Page Photo 2 of 47 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 2 Prince Harry and Prince William visited Niagara Falls with their mom, the late Princess Diana, in October 1991. Previous Next Start Slideshow Prince WilliamPrince HarryThe Royals