Leonardo DiCaprio turns 36 today and to celebrate we're looking bacn at some of Leo's biggest moments! He's been in show business for 20 years and has grown up so much along the way. From his best friends like Tobey Maguire, Lukas Haas and Kevin Connelly to his bikini-loving model girlfriends like Gisele Bundchen and Bar Refaeli, Leonardo has gone from heartthrob to leading man. This year he starred in two blockbusters, Shutter Island and Inception and also made time for his passions in life, like the environment as well as the most important people, like his mom. Happy birthday, Leo!