Robert McElhenney III ( MAK-əl-hen-ee; born April 14, 1977), also known professionally as Rob Mac, is an American actor, screenwriter, producer, director, and businessman. He is best known for his role as Mac on the FX/FXX comedy series It's Always… Robert McElhenney III ( MAK-əl-hen-ee; born April 14, 1977), also known professionally as Rob Mac, is an American actor, screenwriter, producer, director, and businessman. He is best known for his role as Mac on the FX/FXX comedy series It's Always Sunny in Philadelphia (2005–present), a show he created and co-developed with Charlie Day and Glenn Howerton and on which he continues to serve as an executive producer and writer. He is also known for playing Ian Grimm on the Apple TV+ comedy series Mythic Quest (2020–2025), which he co-created with Day and Megan Ganz as executive producers.
In September 2020, McElhenney became the co-owner of the Welsh football club Wrexham A.F.C. with Ryan Reynolds; this has been covered in the FX sports documentary series Welcome to Wrexham (2022–present), for which he won two Primetime Emmy Awards for Outstanding Unstructured Reality Program as one of the executive producers.
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