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Cillian O'Sullivan

Acting Born Sep 28, 1989 New York, USA 17 credits

Biography

Cillian O'Sullivan works in acting. Born September 28, 1989 in New York, USA. Archytele lists 17 screen credits below. A full profile for this page is being written and will appear here once verified against sources.

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Known for

Daredevil: Born Again

as Devlin

Star Trek: Strange New Worlds

as Dr. Roger Korby

FBI: Most Wanted

as Scot Weitzen

Bull

as Nathan Alexander

Chicago P.D.

as Shane Sullivan

The Blacklist

as Skip Sutherland

Vikings

as Eirik

Career timeline

Daredevil: Born AgainThe Lost Princess
The Boy That Never Was
Then You Run
Star Trek: Strange New WorldsIn From the Cold
FBI: Most Wanted
Misty Button
Maze
Bull
Chicago P.D.Halo: Nightfall
The BlacklistVikings
6Degrees
SeachtUncle Bill's Barrel

Full filmography

  • Daredevil: Born Again (2025) as Devlin
  • The Lost Princess (2025) as Alec Touati
  • The Boy That Never Was (2024) as Dave Garrick
  • Then You Run (2023) as Orin
  • Star Trek: Strange New Worlds (2022) as Dr. Roger Korby
  • In From the Cold (2022) as Chauncey
  • FBI: Most Wanted (2020) as Scot Weitzen
  • Misty Button (2019) as James
  • Maze (2017) as Bobby
  • Bull (2016) as Nathan Alexander
  • Chicago P.D. (2014) as Shane Sullivan
  • Halo: Nightfall (2014) as Christian Ramsey (uncredited)
  • The Blacklist (2013) as Skip Sutherland
  • Vikings (2013) as Eirik
  • 6Degrees (2012) as Conor Martin
  • Seacht (2008) as Michael
  • Uncle Bill's Barrel (2008) as Tom Lynch