The star of the FX series also admits he was initially hesitant about the crossover concept as 'It's Always Sunny in ...

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

Note: The following story contains spoilers from "Abbott Elementary" Season 4, Episode 9. When "Abbott Elementary" creator ...

Could the crossover between It's Always Sunny in Philadelphia and Abbott Elementary be a major game-changer for Charlie Kelly ...

ABC released a huge new image gallery from the crossover event between FXX's It's Always Sunny in Philadelphia and ABC's Abbott Elementary.