The writer of a new history on It’s Always Sunny in Philadelphia reveals what’s kept the show going strong for two decades.

Even after 17 seasons and nearly two decades, this long-running mystery in It’s Always Sunny In Philadelphia may never be ...

Tonight's season 17, episode 3 of "It's Always Sunny in Philadelphia" is now available with free streaming options on ...

A theory of why “It’s Always Sunny in Philadelphia,” an excellent show about terrible people, has stayed successful ...

It's Always Sunny in Philadelphia has a long history of putting its characters, and their doomed-to-fail acquaintances, through crazy, consequence-free situations.

Viewers without traditional cable can still stream the latest episode of “It’s Always Sunny in Philadelphia” live and on ...

After witnessing EMTs resuscitate a Paddy's patron, Mac and Dennis set out to become the pinnacle of masculinity in a new ...

Season 17, Episode 1 of FX's "It's Always Sunny in Philadelphia," marks part two of its crossover event with ABC's "Abbott ...

Season 17 of “It’s Always Sunny in Philadelphia” drops two new episodes when it premieres on July 9 and moves to weekly for ...

In Wednesday's Season 17 premiere episode of "It's Always Sunny in Philadelphia," the "Abbott Elementary" cast gets to cuss — ...

After 20 years, one might think that Danny DeVito has gotten tired of playing the bumbling and inexplicably indomitable Frank Reynolds in It’s Always Sunny in Philadelphia. After all, how often is it ...

"Beyond season 18, I don't know... it could quite possibly be the end," says the star and executive producer to THR about the ...