After much anticipation, the unlikely meeting of the two worlds unfolded on Wednesday's installment of "Abbott Elementary." ...

Charlie Kelly fit so naturally into the Abbott ... show through an entirely different prism when you see it on It’s Always Sunny in Philadelphia, and that version is much less family-friendly.

The Abbott Elementary & It's Always Sunny In Philadelphia crossover had some ridiculous rivalries, but Charlie got a surprisingly uplifting subplot.

This matchup brought together two Philly casts: “Abbott Elementary” and “It’s Always Sunny in Philadelphia.” The crossover ...

Between Frank's strange jokes, Charlie's hilarious speeches, and Dennis' quips, Always Sunny has numerous funny lines. It's a show that never loses its humor, no matter how many times a fan ...

Brunson wasn’t the only person to warn unsuspecting Abbott Elementary fans about checking out It’s Always Sunny, which stars Rob McElhenney, Charlie Day, Kaitlin Olson, Glenn Howerton, and Danny ...

The "It's Always Sunny in Philadelphia" crew is headed to "Abbott Elementary" in the first of two crossover episodes.

Wednesday night’s midseason premiere episode of Abbott Elementary, aptly titled “Volunteers,” finally delivered its highly anticipated crossover encounter with the cast of FXX’s It’s Always Sunny in ...

And when the volunteers arrive… hey, it’s Mac, Dennis, Charlie, Dee and Frank from It’s Always Sunny! Dennis spots the cameras filming their every move and instantly makes himself scarce, and when ...

The "Abbott Elementary" and "It's Alway Sunny in Philadelphia" crossover also marked a series high with more than 8 million ...

Charlie, and Frank from neighboring sitcom It’s Always Sunny in Philadelphia. The television event left audiences wondering whether these iconic Philadelphians would ever meet again. Here’s ...