Cillian O'Sullivan
Known For
In From the Cold
TV | 2022
Vikings
TV | 2013
Maze
Movie | 2017
All Credits
Movie Credits
TV Credits
The Lost Princess
Movie | 2025
Alec Touati
Blue Moon
Movie | 2025
Daredevil: Born Again
TV | 2025
Devlin
3 Episodes
Star Trek: Strange New Worlds
TV | 2025
Dr. Roger Korby
4 Episodes
The Boy That Never Was
TV | 2024
Dave Garrick
3 Episodes
Then You Run
TV | 2023
Orin
8 Episodes
In From the Cold
TV | 2022
Chauncey
8 Episodes
Chicago P.D.
TV | 2020
Shane Sullivan
One Episode
Misty Button
Movie | 2019
James
The Blacklist
TV | 2019
Skip Sutherland
2 Episodes
Bull
TV | 2019
Nathan Alexander
One Episode
Maze
Movie | 2017
Bobby
Vikings
TV | 2016
Eirik
One Episode
Halo: Nightfall
Movie | 2014
Christian Ramsey (uncredited)
Uncle Bill's Barrel
Movie | 2008
Tom Lynch
Seacht
TV | 2008
Michael
8 Episodes
The Lost Princess
Movie | 2025
Alec Touati
Blue Moon
Movie | 2025
Misty Button
Movie | 2019
James
Maze
Movie | 2017
Bobby
Halo: Nightfall
Movie | 2014
Christian Ramsey (uncredited)
Uncle Bill's Barrel
Movie | 2008
Tom Lynch
Daredevil: Born Again
TV | 2025
Devlin
3 Episodes
Star Trek: Strange New Worlds
TV | 2025
Dr. Roger Korby
4 Episodes
The Boy That Never Was
TV | 2024
Dave Garrick
3 Episodes
Then You Run
TV | 2023
Orin
8 Episodes
In From the Cold
TV | 2022
Chauncey
8 Episodes
Chicago P.D.
TV | 2020
Shane Sullivan
One Episode
The Blacklist
TV | 2019
Skip Sutherland
2 Episodes
Bull
TV | 2019
Nathan Alexander
One Episode
Vikings
TV | 2016
Eirik
One Episode
Seacht
TV | 2008
Michael
8 Episodes
