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

The respective stars and creators of "Abbott Elementary" and "It's Always Sunny in Philadelphia" discussed how their shows came together for a crossover episode premiering Jan. 8 on ABC.

The creator-stars talk about the challenges of merging PG- and R-rated shows and which characters they wish they could keep in their own worlds forever

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

The idea for this absurd crossover between the two Philly-based comedies has been cooking for a little while now. Most likely, none of the characters from It’s Always Sunny woul