Rob McElhenney is creating buzz as he’s applying to legally change his name. After years of jests, musical odes, and worldwide business growth, the star of It’s Always Sunny in Philadelphia has officially initiated the transformation to be known as “Rob Mac.” This decision stems from frequent mispronunciations of his last name and is already mirrored in the credits for his FX productions.
Here is McElhenney’s take on the name change, and how it aligns with his developing profession and public persona.
Why is Rob McElhenney changing his name?
Rob McElhenney has filed legal documents to change his name to Rob Mac.
As reported by TMZ and several other sources, he officially completed the necessary documents in Los Angeles. This adjustment follows decades of public misunderstandings and misinterpretations regarding his last name.
In simpler terms, the actor-producer explained that the global expansion of his business and creative projects influenced his decision to go by a simpler name, “Rob Mac,” as he finds it difficult for people in different parts of the world to pronounce his original name, which he shared with Variety magazine in May 2025.
The FX network has now credited Rob McElhenney, who stars as Mac and holds the roles of executive producer and writer, with his new name “Rob Mac” in official materials for It’s Always Sunny in Philadelphia. This season change is set to be reflected in the 17th season, airing on July 9, 2025.
2023 saw Ryan Reynolds producing a musical birthday video aimed at clarifying the correct pronunciation of McElhenney’s name. This amusing production included celebrities like Kaitlin Olson, Glenn Howerton, and Charlie Day. In the song, Reynolds humorously pointed out, “It’s McElhenney, it’s McElhenney, there are numerous ways to butcher and mispronounce it.
McElhenney and Olson have two kids named Axel and Leo. In a recent interview, Olson mentioned that their children aren’t too pleased about the situation because they carry the last name, which also happens to be mine, legally (as reported by The Hollywood Reporter).
The name adjustment aligns with McElhenney’s business growth via More Better Industries, encompassing endeavors such as Wrexham AFC and an impending spinoff series, Necaxa. Moreover, he revealed that relatives from his broader family have previously made similar alterations to their surname.
According to both The Hollywood Reporter and People, McElhenney officially changed his name to “Rob Mac,” a nickname he’s been casually using for several months now.
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