- Made film acting debut in The Devil's Own (1997), but his scenes were cut; McElhenney's appearances in Curtis Hanson's Wonder Boys (2000) were also dropped.
- Other big-screen roles include A Civil Action (1998) and Thirteen Conversations About One Thing (2001).
- Along with Glenn Howerton and Charlie Day, created the FX comedy series It's Always Sunny in Philadelphia in 2005.
- McElhenney's original pilot for Sunny was shot for $200 on a hand-held digital camera.
- Diverse TV credits include appearances on ABC's Lost and All My Children, as well as NBC's ER and Law & Order.
- Leo Grey McElhenney — Son
- Kaitlin Olson — Wife
- Axel Lee McElhenney — Son
- Attended Temple University, Philadelphia, PA
Season 3, Episode 5
- Birth Place: Philadelphia, PA
- Birthday: April 14, 1977, Aries
- Profession: Actor, Screenwriter, Producer, Director
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