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.
as Elliot
as Ethan Corbin II(5 eps)
as Self(1 ep)
as Business Manager
as Jim
as Fred (voice)(21 eps)
as Self(1 ep)
as Jerry Alter
as Dennis(1 ep)
as John
as Self(1 ep)
as The Manager
as Audience
as Jerry Conwell(5 eps)
as Richard
as Self(2 eps)
as Self - Guest(1 ep)
as Jack Griffin(42 eps)
as Dominic
as Uncle Al
as Self - Guest(1 ep)
as Don Chumph(5 eps)
as Self - Guest(2 eps)
as Will
as Cliff Gilbert(13 eps)
as Clint (voice)(2 eps)
as Dirt (voice)(1 ep)
as Clint / Dirt (voice)(1 ep)
as Seth Buckley(4 eps)
as Self
as Don Devore(6 eps)
as Gary
as Self(1 ep)
as Dennis Reynolds
as Dennis Reynolds
as Doctor (uncredited)
as Lieutenant Xander Centari
as Mike
as Self(1 ep)
as Matthew Bergman
as Hospital Doctor
as Lilac Young Tough
as Dennis Reynolds(183 eps)
as Michael
as Animal Control Guy #1 (voice)(1 ep)
as Self(1 ep)
as Paul Webster
as Corey Howard(13 eps)
as Dick Ebersol
as Young Guy(1 ep)
as (voice)(3 eps)
as Self(1 ep)
as Nick Cooper(6 eps)
as Peter Linz (voice)(1 ep)
