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

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 two sitcoms could hardly be more tonally different, but this week’s crossover episode of “Abbott” was relatively seamless ...

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

The cast of 'It's Always Sunny In Philadelphia' (CREDIT: Tibrina Hobson/Getty Images) Two sitcoms have collided in a new clip from Abbott Elementary, where they meet the cast of It’s Always ...

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

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 ...

Kicking off Jan. 8 with 'Abbott Elementary', Quinta Brunson and Rob McElhenney shared details of the 'It's Always Sunny in ...

Charlie learns to read, Dee impersonates Ben Franklin, and Frank fights raccoons. We don't quite know what's up with Dennis ...

The “It’s Always Sunny in Philadelphia” cast are the volunteers in the school, who inevitably shake up dynamics among the “Abbott Elementary” teachers. When will the “It’s Always ...

A new “Abbott Elementary” episode brings volunteers from “It’s Always Sunny in Philadelphia.” The crossover episode airs ...

The moment we’ve been waiting for has finally arrived. Wednesday night’s midseason premiere episode of Abbott Elementary, aptly titled “Volunteers,” finally delivered its highly ...