John T. O'Brien (II)

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John T. O'Brien is an American actor, writer and musician best known for his roles on the TV series Chicago Fire (NBC), No Apologies (Fox) and In An Instant (ABC). He wrote, executive produced and starred in Dad Man Walking, an original pilot for television directed by Clare Cooney. He was born in Chicago where he studied acting and improvisation. See full bio »

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Known For

Chicago Fire Male Doctor
Empire Fox Exec One


Jump to: Actor | Writer
Hide Hide Show Show Actor (15 credits)
  Dad Man Walking (TV Series) (completed)
  No Apologies (TV Movie) (completed)
Desk Clerk Michael
  Thank You 5 (completed)
Scot Stevans
 2019 Empire (TV Series)
Fox Exec One
- What Is Love (2019) ... Fox Exec One
 2019 Computer Hackers
 2018 Conrad (TV Series)
Detective Pete Hunt
- Hangin' with Conrad (2018) ... Detective Pete Hunt
 2018 Chicago Fire (TV Series)
Male Doctor
- A Volatile Mixture (2018) ... Male Doctor
 2018 Super Narcoleptic Girl (TV Series)
- Dating (2018) ... Dave
 2016 Waiting on Roxie (Short)
 2016 Dogwalker (Short)
Handsome Man on Train
 2015 Chi City Dreamzzz (TV Series)
 2015 In an Instant (TV Series documentary)
Detective Schmaling
- Left for Dead (2015) ... Detective Schmaling
 2014 The Denim Warrior (Short)
The Denim Warrior
 2012 Rejected (Short)
John O'Leary
 2011 Boss (TV Series)
Aide to Zajac
- Choose (2011) ... Aide to Zajac (uncredited)
- Swallow (2011) ... Aide to Zajac (uncredited)
Hide Hide Show Show Writer (1 credit)
 2014 The Denim Warrior (Short)

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Did You Know?


He attended St. Ignatius College Prep and also trained at the Second City Conservatory and iO in Chicago.

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