Hot Gallery: Happy Birthday Neil Patrick Harris!

Harris doctored his way into the hearts of millions as teen prodigy and physician Doogie Howser from 1989-1993. He may have had the job of an adult, but we loved watching him wade through the tricky waters of adolescence alongside girlfriend Wanda and BFF Vinnie. If you're like us, now the synthesizer tones of the iconic theme music are floating through your head. Time to go write about it on your computer journal...

Who knew this baby-faced cutie would graduate from La Cueva High School in Albuquerque, New Mexico, and become an Emmy-winning, Tony-hosting, beloved actor—not to mention one of Time magazine's 100 most influential people.

Four years after the end of Doogie Howser, M.D. Harris shows he's all grown up and ready for feature films as Col. Carl Jenkins in the Sci-Fi hit movie Starship Troopers.

In the role that re-launched his career, Harris played a hilarious fictional, druggie, womanizing version of himself in Harold & Kumar Go to White Castle.

Harris gets to show a lot more skin, and a whole new (man whore) side to himself as the legen—wait for it—dary Barney Stinson.