Cillian O'Sullivan
Acting
Biography
No overview available.
Known For
Acting History
2025
The Lost Princess
as Alec Touati
Daredevil: Born Again
TVas Devlin
2024
The Boy That Never Was
TVas Dave Garrick
2023
Then You Run
TVas Orin
2022
In From the Cold
TVas Chauncey
Star Trek: Strange New Worlds
TVas Dr. Roger Korby
2019
Misty Button
as James
2017
Maze
as Bobby
2016
Bull
TVas Nathan Alexander
2014
Halo: Nightfall
as Christian Ramsey (uncredited)
Chicago P.D.
TVas Shane Sullivan
2013
The Blacklist
TVas Skip Sutherland
Vikings
TVas Eirik
2008
Uncle Bill's Barrel
as Tom Lynch
Seacht
TVas Michael