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 idea for the crossover was conceived by It’s Always Sunny creator and star Rob McElhenney and Abbott creator and star Quinta Brunson, who was asked to name the greatest rapper of all time for ...

Spoilers for the Abbott Elementary and It’s Always Sunny in Philadelphia crossover are ahead! If you haven’t watched the ...

Court-ordered community service, urine-soaked animal pelts, and a Billy Madison homage: How It’s Always Sunny infiltrated ...

Lisa Kudrow revealed during an interview on “The Drew Barrymore Show” (via People) that she recently discovered a note the ...

Part 1 of the "Abbott Elementary" and "It's Always Sunny in Philadelphia" crossover coincided with the midseason premiere of ...

Lisa Kudrow revealed during an interview on “The Drew Barrymore Show” (via People) that she recently discovered a note the ...

Major studios like NBCUniversal, Warner Bros., Amazon, CBS and Disney suspended production of some of their most popular ...

Wicked” is the leading nominee for the 31st Screen Actors Guild Awards, with the Bob Dylan biopic “A Complete Unknown” following closely behind.

The crossover episode of two is the ultimate tribute to the city’s attitude, quirks, and, of course, its signature phrase: ...

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