The 17-month-old prince beamed in the gardens of Kensington Palace for a photo call. Overall Perfect For his second birthday, William wore all blue for another photoshoot in the Kensington Palace gardens. Ready to Serve Royal reporting for duty! The 4-year-old donned the Parachute Regiment's camo uniform and saluted at the family's home. Go Hand in Hand A bundled up William matched in red with his mom Diana as the family entered the Cirencester Park Polo Club. Styling Socks It was a blue Christmas for William as he wore knee-high socks to church service. In the Bag He toyed with his mom's white handbag during Cartier International Polo Day at Smiths Lawn Polo Club. He's been an avid skier since childhood, spending a holiday with his mom in Switzerland. Ready, Set, Go Just after his 10th birthday, William sat by the racetrack to watch the British Grand Prix. Suit and Tie He's comfortable in a suit and tie, wearing one for public appearances since his early teenage years. In Recovery At the christening of Prince Konstantine Alexios, he sported a sling for a rugby-related injury that required him to undergo an operation. Summer Boy He spent part of his summer in 1997 relaxing along the banks of the River Dee in Scotland. Teal Him Something Good As he entered his college years, William opted for a preppier style, which suited him pretty well. Booksmart Then 18, he went on an expedition with Raleigh International to the village of Tortel in southern Chile. Polo Prince He went from watching the polo games to saddling up for them — and still plays to this day! Push and Pool He attended college at St. Andrews University (where he would meet his future wife Kate). British Royal Family