Rob McElhenney plays Mac on a TBS horror series.
It 's Always Sunny in Philadelphia is an American television black comedy sitcom that premiered on FX on August 4 , 2005 .. FX ( TV channel ). black comedy. black comedy. sitcom. sitcom. It moved to FXX beginning with the ninth season , and has remained there since .. FXX. FXX. It was created by Rob McElhenney , who developed it with Glenn Howerton .. Rob McElhenney. Rob McElhenney. Glenn Howerton. Glenn Howerton. It is executive produced and primarily written by McElhenney , Howerton , and Charlie Day , all of whom star alongside Kaitlin Olson and Danny DeVito .. Charlie Day. Charlie Day. Kaitlin Olson. Kaitlin Olson. Danny DeVito. Danny DeVito. The series follows the exploits of `` The Gang '' , a group of self-centered friends who run the Irish bar Paddy 's Pub in South Philadelphia .. Irish bar. Irish pub. South Philadelphia. South Philadelphia. The series was renewed for a twelfth season that premiered on January 4 , 2017 .. On April 1 , 2016 , the series was renewed for a thirteenth and fourteenth season , which will tie it with The Adventures of Ozzie and Harriet as the longest running live-action sitcom in American TV history .. sitcom. sitcom. The Adventures of Ozzie and Harriet. The Adventures of Ozzie and Harriet