Biography
Glenn Howerton is an American actor, comedian, writer and producer. He trained at the Juilliard School, graduating with a BFA in 2000.
He is best known for playing Dennis Reynolds on the FX/FXX series It's Always Sunny in Philadelphia (2005–present), which he co-developed and on which he serves as writer and executive producer. Other television roles include Cliff Gilbert on The Mindy Project (2012–2017), Don Chumph on Fargo (2014) and Jack Griffin on A.P. Bio (2018–2021). Film appearances include BlackBerry (2023) as Jim Balsillie.
In 2025 he played Ethan Corbin in the Netflix limited series Sirens.
