Wil Wheaton may famously keep a blog, but Neil Patrick Harris may have famously had one of the very first on TV -- Doogie Howser, teenage doctor, fastidiously kept his personal journal at the end of every episode of "Doogie Howser, M.D." He played the role from 1989 until 1993. Before that, though, he was nominated for a Golden Globe for his role in "Clara's Heart." All grown up, NPH continues to act -- as well as produce, direct, host, sing, dance and throw down the occasional magic trick. He's on the small screen (even if you missed him as Doogie, you probably know him as Barney Stinson), the big screen (who can forget his role in "Harold & Kumar Go to White Castle"?) and the stage -- and in 2010 became dad to fraternal twins with partner David Burtka. He also took the stage as the title role in "Hedwig and the Angry Inch" on Broadway in 2014.