It's Always Sunny in Philadelphia is an American sitcom created by Rob McElhenney and co-developed by Glenn Howerton for FX. It premiered on August 4, 2005, and stars Charlie Day, Howerton, McElhenney, Kaitlin Olson, and Danny DeVito. From Wikipedia
The long-running sitcom returns with a two-episode debut highlighting the Gang’s chaotic perspective on their crossover with Abbott Elementary.