That's Rob Mac to you.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,

Rob McElhenney has had much success in TV under that name. McElhenney, co-creator of the long-running comedy series “ It’s Always Sunny in Philadelphia ,” has filed for a legal name change. McElhenney is known to fans of the FXX show as Mac (a character born Ronald McDonald ), so it’s not a long ways off from that.