It's Always Sunny in Philadelphia, also known colloquially as Always Sunny, is an American sitcom created by Rob Mac and co-developed by Glenn Howerton for FX, airing on FXX. It premiered on August 4, 2005, and stars Charlie Day, Howerton, Mac, Kaitlin Olson, and Danny DeVito. The series follows the exploits of a group of narcissistic and sociopathic friends who run the Irish dive bar Paddy's Pub in South Philadelphia, Pennsylvania, but spend most of their free time drinking, scheming, arguing among themselves, and plotting elaborate cons with each other, and at times against each other, for personal benefit, financial gain, revenge, or simply due to boredom or inebriation.