
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.
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Crank: High Voltage
2009 · as Doctor (uncredited)

The Hunt
2020 · as Richard

The Girlfriend
as Elliot

Serenity
2005 · as Lilac Young Tough

Crank
2006 · as Hospital Doctor

BlackBerry
2023 · as Jim

The Strangers
2008 · as Mike

Must Love Dogs
2005 · as Michael

Archenemy
2020 · as The Manager

Fool's Paradise
2023 · as Business Manager

How It Ends
2021 · as John

Everything Must Go
2011 · as Gary

Officer Downe
2016 · as Dominic

A Very Sunny Christmas
2009 · as Dennis Reynolds

Coffee Town
2013 · as Will

Two Weeks
2006 · as Matthew Bergman

The Nightman Cometh: Live
2009 · as Dennis Reynolds

E.D.N.Y.
2003 · as Paul Webster