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

The "Abbott Elementary" and "It's Always Sunny in Philadelphia" crossover episode aired Wednesday, bringing together two completely different Philly sitcom casts for an epic explosion of "Go Birds ...

When the crossover was announced ... When the cast of “Abbott Elementary” appears in an episode of “It’s Always Sunny in Philadelphia,” as is planned for the coming season.

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

The Abbott Elementary & It's Always Sunny In Philadelphia crossover had hilarious character interactions, but it hid callbacks in its witty writing.

Abbott Elementary” and “It’s Always Sunny in Philadelphia" don’t have much common ground. That’s why their collaboration felt ...

The TV crossover is one of television’s ... And that’s exactly what we got when The Gang from It’s Always Sunny in Philadelphia paid a visit to Abbott Elementary in the episode “Volunteers.” ...

The cast of It’s Always Sunny in Philadelphia made its way to the ABC show, which is set in Philly, for the crossover episode of comedy writers’ dreams. The brief promo for the Jan. 8 ...

The highly anticipated crossover episode between Abbott Elementary and It's Always Sunny in Philadelphia is almost here and PEOPLE has the exclusive first look! The episode, titled "Volunteers ...

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

When will the It’s Always Sunny in Philadelphia episode air? While we know for a fact that the Abbott Elementary episode of the two-part crossover event will occur on January 8, the exact date ...

The hit ABC sitcom is joining forces with the cast of FX's "It's Always Sunny in Philadelphia" for a two-part crossover that's sure to bring plenty of belly laughs. The collaboration commenced ...