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.

PHILADELPHIA — "It’s Always Sunny in Philadelphia" star Rob McElhenney is tired of people mispronouncing his last name — so he found a solution. Last week, the actor decided to adopt the name fans have called him for 20 years.

Rob McElhenney has filed legal documents to change his name. The actor reportedly signed the docs Thursday requesting that his surname be changed to Mac — so his new name will be Rob Mac, according to multiple outlets.