Glenn Howerton pulled out all the stops when it came to acting. The multi-talented star engaged audiences throughout his career with supporting appearances on the long-running medical drama "ER" (NBC, 1994-2009) as well as in feature films like the adrenalin-charged blockbuster "Crank" (2006). But it was Howerton's breakout role on the cult hit "It's Always Sunny in Philadelphia" (FX, 2005- ) that truly launched his acting career. On the show, Howerton played a South Philadelphia bar owner with a superiority complex, a dwindling trust fund, and an occasional drug habit. As co-creator, producer and writer of the critically acclaimed and fanatically worshipped series, Howerton showcased his many creative facets and proved that he was an emerging force to be reckoned with in Hollywood's comedic circles.