Let’s face it — you’ve probably been calling him “Mac” this whole time anyway.

Rob McElhenney, known for his role in It’s Always Sunny in Philadelphia, is making an official change. The actor has filed to legally change his name to Rob Mac, as confirmed by his representative to Entertainment Weekly. This will also be his credited name in future projects.

Why the change? McElhenney mentions that many international fans struggle with pronouncing his surname — an issue that’s grown with his work expanding globally.

“As our business and storytelling reach different regions and languages around the world, where my name is even more difficult to pronounce, I’ve decided to go with Rob Mac,” he shared in a recent interview with Variety.

Outside of Sunny, Mac is also known for co-creating and starring in FX’s docuseries Welcome to Wrexham, which follows the rollercoaster journey of the Welsh football club he co-owns with Ryan Reynolds. (Yes, that kind of football — or “soccer,” for the Americans.)

The actor’s production company, More Better Productions, has also dipped into South American soccer ventures — and apparently, his surname proved to be a recurring challenge in conversation.

The struggle became something of an inside joke — so much so that Reynolds gifted his business partner a musical PSA for his birthday, enlisting Wrexham locals and celebrity friends to help the world pronounce “McElhenney.”

“Pronouncing all those Ns and Es and Hs can perplex ’em,” Reynolds crooned in the 2023 video. “So here’s a little birthday gift from all your mates in Wrexham.”

Even Kaitlin Olson, Rob’s wife and Sunny costar, admitted the switch is causing some family friction.

“The kids are really not happy about it, because they have that last name,” she told Variety. “And so do I, legally!”

McElhenney admitted he wrestled with the decision, but was reassured after learning that some of his own relatives had either changed or considered altering the spelling of their surname over the years.

“It felt like I wasn’t being disrespectful to my ancestors,” he said.

With Welcome to Wrexham wrapping its fourth season and already renewed for a fifth, and It’s Always Sunny gearing up for season 18, fans — and title card designers — should have plenty of time to get used to the name Rob Mac.