
John Gallagher Jr.
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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.
Known for
Credits

The Only Living Pickpocket in New York (2026)
Actor

Underwater (2020)
as Liam Smith

10 Cloverfield Lane (2016)
as Emmett

Hush (2016)
as The Man

The Belko Experiment (2017)
as Mike Milch

The Exorcist: Martyrs (2027)
Actor

Peppermint (2018)
as Detective Stan Carmichael

Whatever Works (2009)
as Perry

Jonah Hex (2010)
as Second Lt. Evan

Spring Awakening (2006)
as Moritz Stiefel

Come Play (2020)
as Marty

Which Brings Me to You (2023)
as Wallace

The Best of Enemies (2019)
as Lee Trombley

The Miseducation of Cameron Post (2018)
as Reverend Rick

I.S.S. (2024)
as Christian Campbell

Short Term 12 (2013)
as Mason
Swim Fishy (—)
as Abel

Gone in the Night (2022)
as Max

Abandoned (2022)
as Alex

Margaret (2011)
as Darren

Pieces of April (2003)
as Timmy Burns
20/20 (—)
Actor

The Flamingo Rising (2001)
as Gary

American Woman (2019)
as Juan

Spring Awakening: Those You've Known (2022)
as Self - Moritz

The Good Student (2006)
as Brett Mullen

The Same Storm (2022)
as Dale Salt

Eleven Days (2026)
Actor
Short Term 12: Behind the Scenes (2014)
as Self

Broadway Idiot (2013)
as Self (archive footage)

Sadie (2018)
as Cyrus

The Heart Machine (2014)
as Cody





