Cast & creator
John Gallagher Jr.
Best known for Law & Order: Special Victims Unit, Law & Order, Law & Order: Criminal Intent
John Howard Gallagher Jr. (born June 17, 1984) is an American actor and musician known for originating the role of Moritz Stiefel in Duncan Sheik and Steven Sater's rock musical Spring Awakening, which earned him a Tony Award for Best Featured Actor in a Musical. He also played Johnny in Green Day's Broadway musical, American Idiot, Lee in the 2011 Broadway production of Jerusalem, and Edmund in the 2016 Broadway revival of Long Day's Journey Into Night. He portrayed Jim Harper in Aaron Sorkin's drama series The Newsroom, starred in the HBO mini-series Olive Kitteridge, and played Emmett DeWitt in 10 Cloverfield Lane.
Also known as: John Howard Gallagher Jr., John Gallagher, Johnny Gallagher
30
film credits
15
television credits
45
1951–2027 · acting roles
6.8
average across scored titles
Signature credits
Known for
Across film & television
Filmography (45)
Showing 45 of 45 credits
Law & Order: Special Victims Unit
Jeff Lynwood
1999
Law & Order
Terrence Holt
1990
Law & Order: Criminal Intent
Gary
2001
The West Wing
Tyler
1999
Westworld
Liam Dempsey
2016
Stars in the House
Self
2020
The Newsroom
James Harper
2012
Ed
Eric
2000
Modern Love
Rob
2019
Love Life
Luke Ducharme
2020
10 Cloverfield Lane
Emmett
2016
Art That Made Us
Self - Associate Prof. of Early Modern History
2022
Easy
Lucas
2016
Underwater
Liam Smith
2020
Olive Kitteridge
Christopher Kitteridge
2014
Jonah Hex
Second Lt. Evan
2010
Hush
The Man
2016
Peppermint
Detective Stan Carmichael
2018
The Belko Experiment
Mike Milch
2017
Hallmark Hall of Fame
Gary
1951
Love Monkey
Paul
2006
The Best of Enemies
Lee Trombley
2019
Which Brings Me to You
Wallace
2023
Come Play
Marty
2020
Whatever Works
Perry
2009
Short Term 12
Mason
2013
The Miseducation of Cameron Post
Reverend Rick
2018
Gone in the Night
Max
2022
I.S.S.
Christian Campbell
2024
The Exorcist: Martyrs
2027
Margaret
Darren
2011
Abandoned
Alex
2022
Pieces of April
Timmy Burns
2003
The Good Student
Brett Mullen
2006
Spring Awakening: Those You've Known
Self - Moritz
2022Swim Fishy
Abel
The Same Storm
Dale Salt
2022
The Flamingo Rising
Gary
2001Short Term 12: Behind the Scenes
Self
2014
American Woman
Juan
2019
Sadie
Cyrus
2018
The Heart Machine
Cody
2014
Broadway Idiot
Self (archive footage)
2013