It's Always Sunny in Philadelphia is an American sitcom that premiered on FX on August 4, 2005. It moved to FXX beginning with the ninth season in 2013. The show was created by Rob McElhenney, who developed it with Glenn Howerton. It is executive produced and primarily written by McElhenney, Howerton and Charlie Day, starring alongside Kaitlin Olson and Danny DeVito. The series follows the exploits of "The Gang", a group of narcissistic, sociopathic friends who run the Irish bar Paddy's Pub in South Philadelphia, Pennsylvania.
The 14th season concluded in November 2019, and was renewed for a 15th season in May 2020, which premiered on December 1, 2021. This resulted in it having more seasons than any other American live-action comedy series, replacing The Adventures of Ozzie and Harriet, which ran for 14 seasons between 1952 and 1966. In December 2020, the series was renewed for a total of four additional seasons, bringing it to 18 seasons.The show has received critical acclaim, with many lauding the cast performances and dark humor. It has amassed a large cult following.