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

There's something about FXX's Rob McElhenney, Charlie Day, Glenn Howerton, Kaitlin Olson, and Danny DeVito-starring It's Always Sunny in Philadelphia that's bothered me over the past few years.

After more than two decades of playing Charlie Kelly, Charlie Day‘s beloved ... s Pub — a.k.a. Mac (Rob McElhenney), Dennis (Glenn Howerton), Dee (Kaitlin Olson), Charlie (Day), and Frank ...

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

Would that be something that they would be cool with – especially Dennis (Howerton)? It would be an interesting shift for Day's Charlie and one that would be interesting to explore – though we ...