Home People Glenn Howerton Glenn Howerton shows Glenn Howerton shows Glenn Howerton TV Shows (16) A.P. Bio (2018) As Jack Griffin, He was 41 years old Fargo (2014) As Don Chumph, He was 38 years old Unsupervised (2012) He was 35 years old The Cleveland Show (2009) He was 33 years old Glenn Martin, DDS (2009) He was 33 years old It's Always Sunny in Philadelphia (2005) As Dennis Reynolds, He was 29 years old It's Always Sunny in Philadelphia (2005) He was 29 years old It's Always Sunny in Philadelphia (2005) He was 29 years old It's Always Sunny in Philadelphia (2005) He was 29 years old American Dad! (2005) He was 28 years old That '80s Show (2002) He was 25 years old The Job (2001) He was 24 years old The View (1997) He was 21 years old ER (1994) He was 18 years old Boldly Going Nowhere (1969) Boldly Going Nowhere (1969)
