In a daring branding move, Rob McElhenney, star of It's Always Sunny in Philadelphia and co-owner of Wrexham AFC, is officially changing his name to Rob Mac. According to TMZ, the 47-year-old actor, whose real name is Robert McElhenney III, filed paperwork in Los Angeles this week to legally change his name to the shorter version.

The study claims that viewers have long known him as "Mac" from his comedic persona, and the transformation signals the start of a new phase in his professional and commercial endeavors. Rob told Variety in a different interview that the moniker was never just a stage name and that he intends to seek legal permission to use it.

In the midst of a growing company, Rob McElhenney will alter his name.

The name change, according to sources, wasn't out of the blue. The motivation for the shift was discussed by Rob in a Variety interview in May 2025. He chose to legally change his name to Rob Mac because his business, More Better Industries, and storytelling are growing to other languages and areas where his name may be more difficult to pronounce.

He said that the name change will make things simpler because the public has been referring to him by that name ever since the TV program. With recent acquisitions including football clubs in Mexico and Colombia, McElhenney, an international investor, has a quickly expanding commercial portfolio. He has also invested in beverage, clothing, and technology companies.

The shift is not popular with my children and my spouse, Kaitlin Olson.

Not everyone in Rob Mac's house supports the rebranding, but Rob himself is prepared for it. According to a story in US Weekly magazine, his wife of 17 years, actor Kaitlin Olson, and their two children, Axel Lee, 14, and Leo Grey, 13, are still getting used to it.

Because they share the same last name, the children were not especially enthusiastic about it, according to Olson

The actor had even mentioned that his brother was considering running for office in Culver City and that he would be Pat Mac, which made his siblings envious. Most of the people in their social circle call his sister Katie Katie Mac as well, he said.

According to media accounts, Rob said he was proud of his family history, even though he now goes by the shorter moniker. He said to Variety that he had extensively researched his family history and discovered that their surname had undergone numerous alterations.

According to reports, FX has begun referring to Rob McElhenney as Rob Mac in their press materials for It's Always Sunny and Welcome to Wrexham. It appears that the transition was already underway.

FAQs

Why is Rob McElhenney changing his name?

He’s simplifying his name to “Rob Mac” to avoid pronunciation issues in global business ventures and reflect the nickname most people already use.

What is Rob McElhenney's full name?

His full legal name is Robert McElhenney III.

Is Rob McElhenney Catholic?

Yes, he was raised Catholic and has referenced his upbringing in interviews and his work.

Who did Rob McElhenney have a catch with?

He famously had a catch with NFL legend Tom Brady in a promotional segment tied to Welcome to Wrexham.

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