Glenn Howerton is finally weighing in on the It's Always Sunny in Philadelphia fan theory that his character, Dennis Reynolds ...

Glenn Howerton is finally weighing in on the It’s Always Sunny in Philadelphia fan theory that his character, Dennis Reynolds ...

Because in the two-parter finale, “The High School Reunion,” we learn his first name (much to Dennis’ delight): Ronald McDonald. [ RELATED: Always Sunny & Pee-Wee’s Playhouse Actress Lynne ...

PHILADELPHIA — We’re finally going to see what happened on the other side of the "It’s Always Sunny in Philadelphia' and "Abbott Elementary" crossover.

The highly anticipated "Abbott Elementary" and "It's Always Sunny in Philadelphia" crossover episode will air on Wednesday, Jan. 8 at 9:30 p.m. ET on ABC. It will be available to stream on Hulu ...

In January, the characters of the FX series It's Always Sunny in Philadelphia showed up as court-appointed volunteers on an episode of the ABC sitcom Abbott Elementary. The crossover continues July 9.