Glenn Franklin Howerton III (born April 13, 1976) is an American actor of television and film. He is best-known for his role as Dennis Reynolds on FX's It's Always Sunny in Philadelphia (on which he is also a writer and executive producer). He also played Corey Howard on the short-lived 2002 sitcom That '80s Show. Description above from the Wikipedia article Glenn Franklin Howerton, licensed under CC-BY-SA, full list of contributors on Wikipedia.

Filmography

• Sirens — Ethan Corbin II
• 2023BlackBerry — Jim
• BlackBerry: The Limited Series
• 2023Fool's Paradise — Business Manager
• Velma — Fred (voice)
• 2022The Send-Off — Producer
• 2022The Thief Collector — Jerry Alter
• Abbott Elementary — Dennis
• 2021How It Ends — John
• 2020Archenemy — The Manager
• 2020Mr. Bungle: The Night They Came Home — Audience
• The Fugitive — Jerry Conwell
• 2020The Hunt — Richard
• A.P. Bio — Jack Griffin, Co-Executive Producer, Director
• 2016Officer Downe — Dominic
• 2016When Pigs Fly — Uncle Al
• 2014All the Wilderness — Executive Producer
• Fargo — Don Chumph
• It's Always Sunny in Moscow — Creator
• 2013Coffee Town — Will
• House of Lies — Seth Buckley
• The Mindy Project — Cliff Gilbert
• Unsupervised — Clint / Dirt (voice), Clint (voice), Producer
• 2011Everything Must Go — Gary
• Vietnam in HD — Don Devore
• 2009A Very Sunny Christmas — Dennis Reynolds, Executive Producer
• 2009Crank: High Voltage — Doctor (uncredited)
• Glenn Martin, DDS
• The Cleveland Show
• 2009The Nightman Cometh: Live — Dennis Reynolds, Executive Producer
• Boldly Going Nowhere — Producer, Writer
• 2008The Strangers — Mike
• 2006Crank — Hospital Doctor
• 2006Two Weeks — Matthew Bergman
• American Dad! — Animal Control Guy #1 (voice)
• It's Always Sunny in Philadelphia — Dennis Reynolds, Writer, Director, Executive Producer
• 2005Must Love Dogs — Michael
• 2005Serenity — Lilac Young Tough
• 2003E.D.N.Y. — Paul Webster
• 2002Monday Night Mayhem — Dick Ebersol
• That '80s Show — Corey Howard
• The Job — Young Guy
• Family Guy — (voice)
• ER — Nick Cooper
• The Simpsons — Peter Linz (voice)
• Boldly Going Nowhere — Writer, Executive Producer
• The Girlfriend — Elliot, Screenplay, Producer

Appearances as themselves (13)

• 2025PaleyLive: It’s Always Sunny in Philadelphia 20th Anniversary Celebration! — Self
• Hot Ones Versus — Self
• Welcome to Wrexham — Self
• Snacked — Self
• The Kelly Clarkson Show — Self
• Under A Rock with Tig Notaro — Self - Guest
• The Late Late Show with James Corden — Self - Guest
• Late Night with Seth Meyers — Self - Guest
• 2011A Tribute to Ryan Dunn — Self
• Conan — Self
• Free Radio — Self
• Jimmy Kimmel Live! — Self
• The View — Self