The outrageous Abbott Elementary and It’s Always Sunny In Philadelphia crossover proved that the best combinations are sometimes the most unlikely.

After much anticipation, the unlikely meeting of the two worlds unfolded on Wednesday's installment of "Abbott Elementary." ...

The "Abbott Elementary" and "It's Always Sunny in Philadelphia" crossover episode ... to volunteer after getting into trouble with the law. Along the way, the raunchier comedy of "Always Sunny ...

A popular Mid-City bar was selected to rep Four Walls Whiskey, owned by the creators of the hit FX TV Show "It's Always Sunny ...

Rob McElhenney is ready for the world to see the It’s Always Sunny in Philadelphia side of the show’s crossover with Abbott ...

It’s always busy for the It’s Always Sunny in Philadelphia cast.

Also, as any longtime “Sunny” viewer knows, the show has provided many reasons why the Paddy’s Pub gang should not be allowed within 100 yards of a school — or any child. A clip from a ...