Rob McElhenney
Apr 14, 1977 (48 years old) in Philadelphia, Pennsylvania, USA
Robert Dale "Rob" McElhenney (born April 14, 1977) is an American film and television actor best known for his role as Mac on the FX TV series It's Always Sunny in Philadelphia. He is also credited as creator, developer and executive producer of the show, which has also provided McElhenney with writing and directing credits on various episodes. He is married to Kaitlin Olson, who plays Deandra Reynolds on the show. He has also opened a bar in Philadelphia called Mac's Tavern.
Description above from the Wikipedia article Rob McElhenney, licensed under CC-BY-SA, full list of contributors on Wikipedia.
Known For

Game of Thrones
Ironborn #1

Law & Order
Joey Timon

It's Always Sunny in Philadelphia
Ronald 'Mac' McDonald

Lost
Aldo

Fargo
Officer Oscar Hunt

Deadpool & Wolverine
TVA Soldier

The Mindy Project
Lou Tookers

ER
Andy Fesh

Mythic Quest
Ian Grimm
Credits
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Side Quest 2025Ian★ 5.2
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Deadpool & Wolverine 2024TVA Soldier★ 7.6
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All Town Aren't We 2024Self★ 7
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Welcome to Wrexham 2022Self★ 7.8
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Abbott Elementary 2021Mac★ 7.5
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Mythic Quest 2020Ian Grimm★ 7.2
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The F Word 2017Self★ 3.2
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Fargo 2014Officer Oscar Hunt★ 8.3
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The Mindy Project 2012Lou Tookers★ 6.3
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★ NR
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Self★ 8.4
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Game of Thrones 2011Ironborn #1★ 8.5
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Ronald "Mac" McDonald★ 9.1
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Mac McDonald★ 9.5
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Ronald 'Mac' McDonald★ 8.3
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The Tollbooth 2004Simon Stanton★ 1.5
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Lost 2004Aldo★ 7.9
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Latter Days 2004Elder Harmon★ 6.8
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Campfire Stories 2001Ricky★ 2.3
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Aspiring Medical Student★ 6.3
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Wonder Boys 2000Student★ 6.8
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A Civil Action 1998Teenager on Property★ 6.5
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The Devil's Own 1997Kevin★ 6.2
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ER 1994Andy Fesh★ 7.8
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Law & Order 1990Joey Timon★ 7.4