Quinta Brunson talks about the inspiration behind Abbott Elementary and It's Always Sunny in Philadelphia's crossover episode, what it was like to have Philadelphia Eagles players making an appearance on Abbott Elementary and her Sesame Street appearance.

Philly pride runs strong, even for celebrities. The Welcome to Wrexham creator and Bradley Cooper are not the only famous guest stars to pay tribute to their roots in an episode of Abbott. Eagles football players Jalen Hurts and Jason Kelce also made cameos in Season 3, as Abbott ’s always one to cater to their PA fanbase.

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

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

The collaboration commences with Season 4, Episode 9, of "Abbott Elementary," airing Jan. 8, and will continue with a follow-up episode of "It's Always Sunny in Philadelphia," expected to air in the show's upcoming Season 17.

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