Tim Graham Photo Library via Getty The crown prince is 43! Prince Williamcelebrates his birthday on Saturday, June 21 — another of his many years in the public eye since his 1982 birth toPrince CharlesandPrincess Diana. The royal has grown up with the world watching, from infancy to his college years and fairytale romance withKate Middleton. Ahead, look back on the Prince of Wales' best throwback photos throughout the years. Anwar Hussein/Getty The 17-month-old prince beamed in the gardens of Kensington Palace for a photo call. Anwar Hussein/Getty For his second birthday, William wore all blue for another photoshoot in the Kensington Palace gardens. Tim Graham Photo Library via Getty Royal reporting for duty! The 4-year-old donned the Parachute Regiment's camo uniform and saluted at the family's home. Tim Graham Photo Library via Getty A bundled up William matched in red with his mom Diana as the family entered the Cirencester Park Polo Club. Julian Parker/UK Press via Getty It was a blue Christmas for William as he wore knee-high socks to church service. Julian Parker/UK Press via Getty He toyed with his mom's white handbag during Cartier International Polo Day at Smiths Lawn Polo Club. Anwar Hussein/Getty He's been an avid skier since childhood, spending a holiday with his mom in Switzerland. Anwar Hussein/Getty Just after his 10th birthday, William sat by the racetrack to watch the British Grand Prix. Tim Graham Photo Library via Getty He's comfortable in a suit and tie, wearing one for public appearances since his early teenage years. Tim Graham Photo Library via Gett At the christening of Prince Konstantine Alexios, he sported a sling for a rugby-related injury that required him to undergo an operation. Anwar Hussein/Getty He spent part of his summer in 1997 relaxing along the banks of the River Dee in Scotland. Jayne Fincher/The Fincher Files/Popperfoto via Getty As he entered his college years, William opted for a preppier style, which suited him pretty well. Toby Melville-Pool/Getty Then 18, he went on an expedition with Raleigh International to the village of Tortel in southern Chile. Anthony Harvey/Getty He went from watching the polo games to saddling up for them — andstill plays to this day! Pool Photograph/Corbis/Corbis via Getty He attended college at St. Andrews University (where he would meet his future wife Kate). Read the original article onPeople