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Cillian O'Sullivan
- Known for
- Acting
- Born
- September 28, 1989 · age 36
- From
- New York, USA
§ Known for
Chicago P.D.
2014 · Shane Sullivan
Vikings
2013 · Eirik
Daredevil: Born Again
2025 · Devlin
Star Trek: Strange New Worlds
2022 · Dr. Roger Korby
The Blacklist
2013 · Skip Sutherland
FBI: Most Wanted
2020 · Scot Weitzen
Bull
2016 · Nathan Alexander
Halo: Nightfall
2014 · Christian Ramsey (uncredited)
In From the Cold
2022 · Chauncey
6Degrees
2012 · Conor Martin
Daredevil: Born Again
2025 · TV · Devlin
The Lost Princess
2025 · Alec Touati
The Boy That Never Was
2024 · TV · Dave Garrick
Then You Run
2023 · TV · Orin
In From the Cold
2022 · TV · Chauncey
Star Trek: Strange New Worlds
2022 · TV · Dr. Roger Korby
FBI: Most Wanted
2020 · TV · Scot Weitzen
Misty Button
2019 · James
Maze
2017 · Bobby
Bull
2016 · TV · Nathan Alexander
Chicago P.D.
2014 · TV · Shane Sullivan
Halo: Nightfall
2014 · Christian Ramsey (uncredited)