"I was aching to do other things and so I was starting to feel a little boxed in," the star and co-creator adds.

You can see Glenn Howerton in It’s Always Sunny in Philadelphia, which is now streaming with a Hulu subscription. The show ...

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Plus, Charlie Day and Glenn Howerton tell TheWrap which other sitcom they'd love to cross over with after "Abbott Elementary.

It’s Always Sunny in Philadelphia star Glenn Howerton almost quit the show over fears that the long-running sitcom, now in ...

Glenn Howerton addresses the ongoing 'It's Always Sunny in Philadelphia' fan theory about Dennis Reynolds being a serial ...

FX's It’s Always Sunny in Philadelphia is one of the longest-running American sitcoms in the USA now. The show debuted with ...

In this clip from FXX's It's Always Sunny in Philadelphia Season 17 opener, Charlie isn't happy with the current state of ...

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