Brunson previously detailed how the really exciting crossover came to be as she appeared last week onJimmy Kimmel Live.

I was screaming at my TV.

And then we kind of connected over that.

The casts of ‘It’s Always Sunny in Philadelphia’ and ‘Abbott Elementary’ pose opposite each other in a school hallway.

‘It’s Always Sunny in Philadelphia’ stars Rob McElhenney, Kaitlin Olson, Danny DeVito, Glenn Howerton and Charlie Day join ‘Abbott Elementary’ stars Janelle James, Lisa Ann Walter, Sheryl Lee Ralph, Chris Perfetti, Tyler James Williams and creator Quinta Brunson on the set of an upcoming crossover episode.Twitter/Rob McElhenney

Season 4 ofAbbott Elementarygets real Sunny, she captioned thepost.

Today… 20 years later we start filming season 17.

These kids didnt know what they were doing, but they had a vision.

‘Abbott Elementary’ and ‘It’s Always Sunny In Philadelphia’

Thank you to FX for trusting that vision.

Thank you to our fans who preached the gospel from the start.

We are eternally grateful.