Glenn Howerton, who stars as the sociopathic Dennis Reynolds in the long-running sitcom “It’s Always Sunny in Philadelphia,” revealed that he once almost left the show, which is currently in Season 17 ...

The implication of It's Always Sunny in Philadelphia becoming the longest-running live-action sitcom — with 17 seasons and counting — is that fans have a bottomless tap of material they keep coming ...

Out of all the members of The Gang in It's Always Sunny in Philadelphia, by far the most disturbing and frightening is Dennis. While every member has displayed large amounts of narcissism and cruelty, ...

Watch The Normies react to It's Always Sunny in Philadelphia season 4 episode 13! Weekly schedule: Get EARLY ACCESS or ...

Jennie Richardson is a TV Features and Lists Writer for Collider, and a graduate student pursuing an MFA in Fiction Writing. In other words, she really loves stories. Editor's note: The below contains ...

Jennie Richardson is a TV Features and Lists Writer for Collider, and a graduate student pursuing an MFA in Fiction Writing. In other words, she really loves stories. Editor's Note: The following ...

Rob McElhenney as Ronald 'Mac' McDonald, Kaitlin Olson as Deandra 'Sweet Dee' Reynolds, Charlie Day as Charlie Kelly, Danny DeVito as Frank Reynolds, and Glenn Howerton as Dennis Reynolds on 'It's ...