It's Always Sunny in Philadelphia

*It's Always Sunny in Philadelphia*
It's Always Sunny in Philadelphia
	Title card from seasons 1–5
Genre	Sitcom; Black comedy; Satire;
Created by	Rob Mac
Developed by	Rob Mac; Glenn Howerton;
Showrunners	Rob Mac; Glenn Howerton; Charlie Day;
Starring	Charlie Day; Glenn Howerton; Rob Mac; Kaitlin Olson; Danny DeVito;
Theme music composer	Heinz Kiessling
Opening theme	"Temptation Sensation"
Country of origin	United States
Original language	English
No. of seasons	17
No. of episodes	178 (list of episodes)
Production
Executive producers	Rob Mac; Glenn Howerton; Charlie Day; Michael Rotenberg; Nick Frenkel; John Fortenberry; Dan Attias; Tom Lofaro; Scott Marder; Rob Rosell; David Hornsby; Matt Shakman; Megan Ganz; Dannah Phirman; Danielle Schneider; Victor Hsu; Nina Pedrad; John Chernin; Dave Chernin;
Producer	Tom Lofaro
Production locations	Los Angeles, California; Philadelphia, Pennsylvania;
Cinematography	Peter Smokler; John Tanzer; Eric Zimmerman;
Editors	Josh Drisko; Tim Roche; Robert Bramwell; Skip Collector; Trevor Penna; Scott Draper; Steve Welch;
Camera setup	Single-camera
Running time	18–43 minutes
Production companies	3 Arts Entertainment; RCG Productions; 20th Century Fox Television (Seasons 1–2); FXP (Season 3–present);
Original release
Network	FX
Release	August 4, 2005 –; December 20, 2012
Release	July 9, 2025 –; present
Network	FXX
Release	September 4, 2013 –; present
	Infobox instructions (only shown in preview)

It's Always Sunny in Philadelphia, also commonly referred to as Always Sunny or IASIP, is an American sitcom created by Rob Mac and co-developed by Glenn Howerton for FX, currently airing on FXX. The show premiered on August 4, 2005, and stars Charlie Day, Howerton, Mac, Kaitlin Olson, and Danny DeVito, with Day, Howerton, and Mac as executive producers.

The series, influenced by earlier sitcoms like The Office, Seinfeld and Curb Your Enthusiasm, follows the exploits of a group of narcissistic, sociopathic friends who run an Irish dive bar in South Philadelphia, but spend most of their free time drinking, scheming, fighting one another and ruining other people's lives for financial gain and revenge, or simply out of boredom or inebriation.

IASIP is the longest-running American live-action sitcom in terms of total seasons, surpassing The Adventures of Ozzie and Harriet's 14 seasons, with the release of its 15th season in December 2021. In December 2020, the series was renewed for a total of four additional seasons, bringing it to a total of 18 seasons. The seventeenth and most recent season premiered on July 9, 2025, and ended on August 20, 2025, with an eighteenth season in development.

The series has received critical acclaim, being variously described as "Seinfeld on crack" and "white trash comedy", with many critics lauding the show's dark humor and satire and the cast's performances. It has a large cult following.