Glenn Howerton shares moment when he realized ‘Always Sunny’ was so popular

Glenn Howerton appeared Thursday night on “The Late Late Show with James Corden,” where the actor talked about the moment he realized “It’s Always Sunny in Philadelphia” was a success and how he can’t walk around Philly or into Irish pubs without fans of the show mobbing him. The 15th season of “Always Sunny” premiered Wednesday night on FXX, cementing it as the longest-running live-action comedy series in American television history.

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