It’s always busy for the It’s Always Sunny in Philadelphia cast.

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 Philadelphia ... with something funny to do. Charlie Kelly fit so naturally ...

When “Abbott Elementary” creator Quinta Brunson mentioned the idea of a crossover episode with “It’s ... was Charlie’s illiteracy, which has long been referenced in “Always Sunny ...

Essentially, "bird law" is a total non-sequitur played off for laughs to show how out-of-depth Charlie is in the real world. It’s a nice wink to "Always Sunny" fans watching the crossover.

Rob McElhenney explains how Mythic Quest co-creator Charlie Day's appearance in season 4 came about and why it was finally the right time.

At first glance, a crossover episode between Abbott Elementary and It’s Always Sunny in Philadelphia makes all the sense in the world. Both comedies are beloved by their respective fans, set in ...

Since 2005, the FX (and FXX) sitcom “It’s Always Sunny in Philadelphia” has ... Mac (McElhenney), the dim, boyish hunk; Charlie (Charlie Day), the illiterate, easily confused handyman ...

T he Gang has ruined plenty of other people’s lives on It’s Always Sunny in Philadelphia, but the biggest victim within the ...