His new name already appears in FX's official materials.

PEOPLE confirmed that the It's Always Sunny in Philadelphia star and creator filed to change his name due to confusion over the pronunciation.

Entertainment Weekly reported that the star will now be credited as Robert Mac in FX's materials for the long-running show in which he produces, writes and plays the character of Mac.

In May, the Emmy winner told Variety that he was eyeing the name change as people were struggling to pronounce McElhenney.

According to TMZ, he signed the documents on June 26.

“As our business and our storytelling is expanding into other regions of the world and other languages in which my name is even harder to pronounce, I’m just going by Rob Mac," he said highlighting his company More Better Industries' global investments.

He further revealed that other family members had modified the surname and agreed they were eager for the change.

As for his children, he said they are still adjusting.

Rob shares two children with his wife, Kaitlin Olsen who he met on the FX show in 2005.