Rob McElhenney, soon to be known as Rob Mac, is defending the decision to change his last name. In a recent post on X, McElhenney shared a brief video explaining why he abridged his last name for those still scratching their heads over the news.

Call him an actor, writer, producer, director, Welsh soccer-team owner and creator of "It's Always Sunny in Philadelphia" – just don't call him Rob McElhenney. It's Rob Mac now.

It's Always Sunny in Philadelphia star Rob McElhenney knows you think it's "kinda douchey" for him to change his name to Rob Mac, but here's the thing — he doesn't really care. The actor took to social media Tuesday to explain his decision in a characteristically comical video captioned simply, "I said what I said."