The 'Abbott Elementary' EPs talk jokes cut from 'Always Sunny' crossover, including backstories for Frank and Mr. Johnson.

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.

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

The cast of "It's Always Sunny in Philadelphia" will appeared on "Abbott Elementary." Here's how to watch, when it airs and ...

Always the optimist, Jacob muses about how much he loves the city he lives in, stating that it’s always sunny in… well, you get it.

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

Philly pride runs strong, even for celebrities. The Welcome to Wrexham creator and Bradley Cooper are not the only famous ...

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

The actor and Quinta Brunson described how the tones of the two sitcoms would mesh and teased which characters would be ...