“Abbott Elementary” star and creator, Quinta Brunson, and “It’s Always Sunny in Philadelphia” star and co-creator. Rob McElhenney, both shared news they’re collaborating on a crossover episode on social media.

We’re also wondering if the Abbott cast will return the favor when It’s Always Sunny in Philadelphia ’s 17th season starts filming. (I can totally see Lisa Ann Walter’s Melissa Schemmenti in that world, and it would be hilarious to see them involved in some NSFW antics outside of the elementary school.)

While plenty of new faces are arriving at the Philly elementary school, Abbott fans can rest assured that some traditions are back. After having a midseason start last year, the show is back to a 22-episode season, which means holiday episodes are coming.