A National Concern' falls short in It's Always Sunny in Philadelphia season 17, despite calling back to a classic.

It’s Always Sunny in Philadelphia: An A-ha song inspired the show's original title It’s Always Sunny in Philadelphia was not the creators’ first choice for a title. In fact, Rob McElhenney, Glenn ...

"It's Always Sunny in Philadelphia" Season 17, Episode 4 airs Wednesday, July 23, on FX.

Danny DeVito shared the ridiculous story behind It's Always Sunny's stars pulling an epic April Fool's Day prank on him.

When It’s Always Sunny in Philadelphia debuted on FX in 2005, it arrived with little fanfare and even less polish. Shot on a shoestring budget, the pilot was a scrappy, crude comedy about three ...

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.

Here's hoping these It's Always Sunny in Philadelphia characters are back for Season 17.

It's Always Sunny in Philadelphia star Charlie Day discussed the long-running series's future, including Season 18 and beyond.

It's Always Sunny in Philadelphia is a sitcom and black comedy created by Rob McElhenney. It stars Rob McElhenney, Charlie Day, Kaitlin Olson, Glenn Howerton, and Danny DeVito.

Here is when new episodes of "It's Always Sunny in Philadelphia" air and where you can stream them.

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