Charlie Day, from 'Horrible Bosses 2,' has been charming the world for years as grubby wildcard Charlie Kelly on TV's 'It's Always Sunny in Philadelphia.' In honor of the actor's return to the big ...

It's Always Sunny In Philadelphia is the longest-running comedy sitcom of all time, leading to plenty of great lines. Which quotes are the best?

NEED TO KNOW Charlie Day said he “would love” to make a cameo in his wife Mary Elizabeth Ellis’ latest show, Netflix’s A Man on the Inside, while chatting exclusively with PEOPLE at the It’s Always ...

Charlie Day said he “would love” to make a cameo in his wife Mary Elizabeth Ellis’ latest show, Netflix’s A Man on the Inside, while chatting exclusively with PEOPLE at the It’s Always ...

Day and Ellis previously worked together on It's Always Sunny. The latter has portrayed The Waitress — the object of Day's character Charlie Kelly's obsessive, unrequited love — in 37 episodes across ...