It's Always Sunny in Philadelphia

Glenn Howerton stars as "Dennis" in the critically-acclaimed FXX original series It’s Always Sunny in Philadelphia. He also serves as a writer and executive producer of the show.

Career Highlights

Glenn Howerton can most recently be seen playing Ethan Corbin II in the 2025 Netflix dark comedy-drama “Sirens” alongside Meghann Fahy, Milly Alcock, Julianne Moore and Kevin Bacon. Additionally, Howerton can be seen as Jim Balsillie in IFC’s Canadian biopic film, “BlackBerry.” Directed by Matt Johnson, the film premiered at the Berlin Film Festival in May 2023 to rave reviews with Deadline calling his performance “sensational” and Variety saying he “stole the show in the rowdy Tech-World Satire." Howerton’s portrayal in the breakout indie film garnered him a nomination for Best Supporting Actor at the Gotham Awards and Best Supporting Performance at the Independent Spirit Awards.Howerton is best known for playing the jerk-next-door Dennis Reynolds on FX’s wildly popular and long-running “It’s Always Sunny in Philadelphia.” In addition to his starring role, Howerton serves as co-creator and writer on the series. He and the other “Sunny” stars and co-creators launched Four Walls, a new Irish whiskey brand. It was initially released as a premium, collector’s edition bottle to benefit the bartending community and to celebrate 15 record-breaking seasons of their show. The everyday-drinking version of Four Walls began rolling out to bars around the country in 2023.Howerton can also be seen in “Fool’s Paradise,” written and directed by Charlie Day. The film follows a fool who accidentally becomes a celebrity and loses it all. Howerton can be also seen playing John in “How It Ends,” the feel-good apocalyptic comedy-drama film written, directed and produced by Daryl Wein and Zoe Lister-Jones. He previously starred alongside Patton Oswalt in four seasons of the NBC and Peacock comedy “A.P. Bio.”A true multi-hyphenate, Howerton is a graduate of the prestigious Juilliard School of Drama and began his career onstage. He has also been seen in television hits such as “The Mindy Project,” the first installment of FX’s original anthology series “Fargo” and Showtime’s “House of Lies.” His film work includes Lionsgate’s “Everything Must Go” starring Will Ferrell, Lionsgate’s “Crank” and “Crank 2” starring Jason Statham. He also produced his first feature “All the Wilderness,” which starred Kodi Smit-McPhee.The son of a decorated Air Force fighter pilot, Howerton was born in Japan and lived all over the world before settling with his family in Montgomery, Alabama. Howerton currently lives in Los Angeles with his wife and children.Howerton is represented by WME, 3 Arts Entertainment and Sloane, Offer, Weber &amp; Dern.

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Glenn Howerton plays "Dennis Reynolds" on It's Always Sunny in Philadelphia. He also serves as writer and executive producer for the critically-acclaimed original series on FXX.

Glenn Howerton headshot wearing a light blue button up outdoors with trees behind him.

Glenn Howerton as Dennis Reynolds | Always Sunny on FXX

It's Always Sunny in Philadelphia

Glenn Howerton

Career Highlights

Kaitlin Olson
as Dee

Danny DeVito
as Frank

David Hornsby
as Rickety Cricket / Executive Producer / Writer

Glenn Howerton as Dennis Reynolds | Always Sunny on FXX

Glenn Howerton

Danny DeVitoas Frank

David Hornsbyas Rickety Cricket / Executive Producer / Writer

Danny DeVito
as Frank

David Hornsby
as Rickety Cricket / Executive Producer / Writer