Glenn Howerton
Acting
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.
PaleyLive: It’s Always Sunny in Philadelphia 20th Anniversary Celebration!
Self
Fool's Paradise
Business Manager
BlackBerry
Jim
The Thief Collector
Jerry Alter
How It Ends
John
Archenemy
The Manager
Mr. Bungle: The Night They Came Home
Audience
The Hunt
Richard
Officer Downe
Dominic
When Pigs Fly
Uncle Al
Coffee Town
Will
A Tribute to Ryan Dunn
Self
Everything Must Go
Gary
A Very Sunny Christmas
Dennis Reynolds
The Nightman Cometh: Live
Dennis Reynolds
Crank: High Voltage
Doctor (uncredited)
The Strangers
Mike
Two Weeks
Matthew Bergman
Crank
Hospital Doctor
Serenity
Lilac Young Tough
Must Love Dogs
Michael
E.D.N.Y.
Paul Webster
Monday Night Mayhem
Dick Ebersol