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

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

"Abbott Elementary" star Janelle James is schooling us on that "It's Always Sunny" crossover and unwinding with the help of "rich people" wellness.

This week's "Abbott Elementary" episode is just half of the story. "Volunteers" featured the long-awaited crossover with FX's long-running "It's Always Sunny in Philadelphia," as told from the vantage point of the hit ABC sitcom.

On Wednesday, you have not one, but two hilarious reasons to turn on your TV, as the casts of It's Always Sunny in Philadelphia and Abbott Elementary will deliver their highly anticipated first crossover episode.

It might be always sunny in Philadelphia, but that doesn't mean there aren't some clouds about to hit Abbott Elementary school. A major crossover event kicks off on Wednesday's episode of Abbott Elementary,