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.

Filmography

• 2027The Exorcist: Martyrs
• 2026Eleven Days
• 2024I.S.S. — Christian Campbell
• 2023Which Brings Me to You — Wallace
• 2022Abandoned — Alex
• 2022Gone in the Night — Max
• 2022The Same Storm — Dale Salt
• 2020Come Play — Marty
• Love Life — Luke Ducharme
• 2020Underwater — Liam Smith
• 2019American Woman — Juan
• Modern Love — Rob
• 2019The Best of Enemies — Lee Trombley
• 2018Peppermint — Detective Stan Carmichael
• 2018Sadie — Cyrus
• 2018The Miseducation of Cameron Post — Reverend Rick
• 2017The Belko Experiment — Mike Milch
• 201610 Cloverfield Lane — Emmett
• Easy — Lucas
• 2016Hush — The Man
• Westworld — Liam Dempsey
• Olive Kitteridge — Christopher Kitteridge
• 2014The Heart Machine — Cody
• 2013Short Term 12 — Mason
• The Newsroom — James Harper
• 2011Margaret — Darren
• 2010Jonah Hex — Second Lt. Evan
• 2009Whatever Works — Perry
• Love Monkey — Paul
• 2006The Good Student — Brett Mullen
• 2003Pieces of April — Timmy Burns
• Law & Order: Criminal Intent — Gary
• 2001The Flamingo Rising — Gary
• Ed — Eric
• Law & Order: Special Victims Unit — Jeff Lynwood
• The West Wing — Tyler
• Law & Order — Terrence Holt
• Hallmark Hall of Fame — Gary
• 20/20
• Swim Fishy — Abel

Appearances as themselves (5)

• Art That Made Us — Self - Associate Prof. of Early Modern History
• 2022Spring Awakening: Those You've Known — Self - Moritz
• Stars in the House — Self
• 2014Short Term 12: Behind the Scenes — Self
• 2013Broadway Idiot — Self (archive footage)