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

As of Jan. 9, the episode is available to stream on Hulu. The second crossover is expected to be an episode of "It's Always Sunny in Philadelphia," which has aired on FXX since 2013.

This matchup brought together two Philly casts: “Abbott Elementary” and “It’s Always Sunny in Philadelphia.” The crossover ...

Here's some background and inside jokes to help fill in some of the gaps for viewers who don't watch both Philly-based shows.

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

The highly anticipated crossover episode of “Abbott Elementary” and “It’s Always Sunny in Philadelphia” blends the raunchy, NSFW style of the FX show with the witty, family-friendly romp.

Wednesday night’s midseason premiere episode of Abbott Elementary, aptly titled “Volunteers,” finally delivered its highly ...

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 outrageous Abbott Elementary and It’s Always Sunny In Philadelphia crossover proved that the best combinations are ...

Charlie, Mac, Dee, Dennis and Frank will cross paths with Janine, Ava, Barbara, Gregory, Melissa, Jacob and Mr. Johnson The ...