Rob McElhenney

Robert Dale McElhenney III ( MAK-əl-hen-ee; born April 14, 1977), also known professionally as Rob Mac, is an American actor, comedian, 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.

Robert Dale McElhenney III was born in Philadelphia, Pennsylvania, on April 14, 1977. Both of McElhenney's parents were of Irish descent. He was raised Catholic. Through his father, he is a cousin of Olympic rower Marcus McElhenney. When he was eight years old, his parents divorced after his mother came out as a lesbian, though his parents remained close after the divorce. He has two full siblings: his sister, Katie McElhenney, and his brother, Patrick McElhenney, as well as a half-sister and half-brother through his father's subsequent marriage. His two brothers are gay, he was "partly raised by two women," and therefore describes himself as having "always been part of the gay community".

McElhenney attended Waldron Mercy Academy and St. Joseph's Preparatory School in Philadelphia. He later briefly attended Temple University and then temporarily lived on the Fordham University campus with friends, but chose not to enroll.

McElhenney had his first major acting role with a small part in the 1997 film The Devil's Own, though his role was cut out of the final edit; the same thing eventually happened to him in Wonder Boys (2000). He followed this with small parts in the films A Civil Action (1998) and Thirteen Conversations About One Thing (2001). He later had more substantial parts in the films Latter Days (2003) and The Tollbooth (2004), and a guest role in the Law & Order episode "Thrill". When he was 21, a screenplay he wrote was optioned with Paul Schrader attached to direct, but the project fell through after a year of edits and rewrites.

Initially based in New York City, McElhenney moved to Los Angeles at the age of 25. When he was 27 years old, he was waiting tables between acting jobs and had met Glenn Howerton through his agent, as well as meeting Charlie Day while shooting a horror film in New York City. His idea for a sitcom starring himself, Howerton, and Day came from a suggestion originally made by one of his closest childhood friends. The pilot was filmed on a budget of $200 and pitched to various cable networks. After receiving offers from many of the networks, McElhenney chose to sign with FX/FXX, as they allowed him more creative freedom, and the show was eventually titled It's Always Sunny in Philadelphia. McElhenney was contracted as its showrunner, while both Howerton and Day were listed as executive producers. In December 2021, It's Always Sunny became the longest-running live-action American comedy of all time with the release of its 15th season. As of April 2026, the series is still ongoing, with its 18th season in the works.

McElhenney has said that 50 weeks per year are taken up by acting, producing, and writing for It's Always Sunny, though he did find time to appear in the Lost episode "Not in Portland". This was a result of him meeting Lost co-creator Damon Lindelof, who is a fan of It's Always Sunny. He later reprised his Lost role in another episode. He is a fan of Game of Thrones and said he was thrilled when the series' creators David Benioff and D.B. Weiss asked him if they could write an episode of It's Always Sunny. He and his co-producers accepted the offer, resulting in the episode "Flowers for Charlie" in 2013. In 2019, he had a cameo appearance as an extra in the Game of Thrones episode "Winterfell".

In July 2015, McElhenney was confirmed by Mojang as the director of the upcoming animated Minecraft movie, but he later left the project.

In 2017, McElhenney appeared in a guest role as a police officer in the acclaimed Fargo episode "The Law of Non-Contradiction". He received praise for his performance from critics, who saw many of his character's traits and plot points as references to It's Always Sunny.

In 2009, McElhenney and his wife Kaitlin Olson (who plays Dee on Its Always Sunny in Philadelphia) along with others purchased Skinner's Bar, now Mac's Tavern at 226 Market Street in Philadelphia.

On September 23, 2020, it was announced by the Wrexham Supporters Trust that a business partnership had been formed by McElhenney and Canadian actor Ryan Reynolds and that they were in talks to purchase the Welsh football team, Wrexham AFC. On November 16, 2020, it was confirmed that the two had successfully taken over the club after receiving the backing of the Wrexham Supporters Trust. On April 22, 2023, Wrexham achieved promotion to League Two and also became National League champions under their ownership. This marked a return for Wrexham to the English Football League (EFL) after a 15-year absence. On April 13, 2024, Wrexham secured promotion to League One, finishing 2nd in League Two and securing automatic league promotion. In May 2025, Wrexham secured promotion to the Championship, finishing 2nd in League One and securing automatic league promotion. In April 2024, some of Club Necaxa's owners purchased a 5% stake in Wrexham, reciprocated by Reynolds and McElhenney purchasing a minority ownership stake in Club Necaxa.

On June 7, 2022, McElhenney announced the launch of a new entertainment-tech company named Adim, co-founded by himself, Chase Rosenblatt, Melissa Kaspers, Spencer Marell, and Richard Rosenblatt.

In 2023, McElhenney and his It's Always Sunny co-stars Glenn Howerton and Charlie Day launched an Irish American Whiskey company to bottle the spirit of Paddy's Pub, named Four Walls, as a tribute to the four walls of the bar they call home on the show.

On June 26, 2023, it was announced that both Ryan Reynolds and McElhenney were part of an investor group that bought a 24% equity stake in the Alpine F1 Team.

McElhenney has a sister, Katie, who co-created and wrote for the Mythic Quest spin-off series Side Quest, as well as the series High Potential, where his wife, Kaitlin Olson, serves as the lead and executive producer.

He hired Olson to play Dee Reynolds on It's Always Sunny in Philadelphia and became romantically interested in her "around season two" of the series. He has called her "the funniest woman in show business". They were married in California on September 27, 2008. They have two sons; Olson went into labor with their first son while at a Los Angeles Dodgers home game against the Philadelphia Phillies.