It's Always Sunny in Philadelphia is a farcical ensemble comedy on FX that revolves around a group of friends who own a bar in Philadelphia. The running joke of the. With Charlie Day, Glenn Howerton, Rob McElhenney, Kaitlin Olson. Four young friends with big egos and slightly arrogant attitudes are the proprietors of an Irish bar. It's Always Sunny In Philadelphia Season 3 Blooper Reel Season 7 Blooper Reel 'It's Always Sunny in Philadelphia' Cast Talks Two More Seasons and No Emmy Love Depraved underachieving might look easy, but for Mac, Charlie, Dennis, and Dee, it’s an art form. It’s Always Sunny in Philadelphia follows the exploits of “The. Amazon.com: It's Always Sunny in Philadelphia: The Complete Season 9: Danny DeVito, Charlie Day, Glenn Howerton, Rob McElhenney, Kaitlin Olson: Movies & TV It's Always Sunny in Philadelphia is an American comedy television series that began airing on August 4, 2005 on FX. The series follows The Gang , a group of five. It's Always Sunny in Philadelphia is an American television sitcom that premiered on FX on August 4, 2005, and moved to FXX beginning with the ninth season. It's Always Sunny in Philadelphia is an FX sitcom created by Rob McElhenney about four friends (played by McElhenney, Charlie Day, Glenn Howerton and Kaitlin Olson.