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

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

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

Here's a look at our real-time thoughts on tonight's crossover between FXX's It's Always Sunny in Philadelphia and ABC's ...

The biggest moment in Philly television arrives early in the new year with a crossover episode of "Abbott Elementary" and "It ...

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