The actors discuss playing best friends and roommates on FX's long-running comedy, which kicks off its 17th season Wednesday, ...

Plus, Charlie Day and Glenn Howerton tell TheWrap which other sitcom they'd love to cross over with after "Abbott Elementary.

"It's Always Sunny in Philadelphia" returns tonight at 9 p.m. ET on FXX with the Season 17 premiere and a must-see comedy ...

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

Speaking exclusively to PEOPLE at PaleyLive's It’s Always Sunny In Philadelphia 20th Anniversary Celebration in Los Angeles ...

Day and co-writer/star Rob Mac disagreed on whether or not cross over with "Abbott Elementary" and "The Golden Bachelor" in the new season ...

Charlie Day: Wait, Danny, let me tell you a story about my old, old friend here. Spell McElhenney…Spell it. Danny DeVito: I ...

It's Always Sunny in Philadelphia might be made up of a gang full of narcissistic individuals, but the creative team has ...

You would think a show like It's Always Sunny in Philadelphia would lose steam after 17 seasons. Instead, it's better than ...

“They were like, ‘We don’t want to end it,'” Howerton recalled his co-stars saying. “And I was like, ‘Oh, well I can’t stop ...

In January, the characters of the FX series It's Always Sunny in Philadelphia showed up as court-appointed volunteers on an episode of the ABC sitcom Abbott Elementary. The crossover continues July 9.

It's Always Sunny in Philadelphia has some absurd stunts by one of the characters, Frank Reynolds, played by Danny DeVito.