It's Always Sunny in Scranton. One of the great Pennsylvania-set comedies, It's Always Sunny in Philadelphia, has taken over the California studio that served as the filming location for another great Pennsylvania-set comedy, The Office. Sunny star Rob McElhenney shared a hilariously trolly Instagram video from the set.

"Apparently this is Dunder Mifflin, I guess, where they shot The Office," McElhenney said, moving his phone to get a better shot of the very familiar front of 1725 Slough Avenue (which in reality is part of Chandler Valley Center Studios in Los Angeles). "I wasn't 100% sure of that. But they're gone now. They're off the air. And now you got — sorry, Carell," he said, turning his phone to show Danny DeVito, sans pants, standing in the doorway of his trailer talking to Charlie Day.

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"I guess your show got canceled or whatever, but we're still doing ours," he said. Sunny and The Office both premiered in 2005, but almost no show has matched Sunny's incredible longevity. It's Always Sunny in Philadelphia is in production on its fourteenth season, which will tie it with The Adventures of Ozzie and Harriet for the longest-running live action sitcom in TV history.

Check out the video:

It's Always Sunny in Philadelphia Season 14 premieres Wednesday, September 25 on FXX.