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

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

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

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 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 ...

ABC has revealed the first promo for the 'Abbott Elementary' and 'It's Always Sunny in Philadelphia' crossover event. ABC Although the holidays are barely over, ABC is ready to get back to class ...

Spoilers for the Abbott Elementary and It’s Always Sunny in Philadelphia crossover are ahead! If you haven’t watched the first half of this event yet, you can stream the Abbott episode with a Hulu ...

The cast of It’s Always Sunny in Philadelphia invades Abbott Elementary in the first teaser trailer for the comedy crossover event. It’s pretty uncommon to see shows on one network crossover ...

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 ...

“Sweet Baby Jesus and the grown one too.” The ‘Abbott Elementary’ and ‘It’s Always Sunny in Philadelphia’ crossover episode (the first of two) is officially happening. Airing January ...

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 ...