ActingPopularity 1
Cillian O'Sullivan
No biography available.
Also Known As
Cillian O'SuilleabhainCillian Ó Súilleabháin
Movie Appearances
TV Appearances
Vikings
as Eirik
2013
In From the Cold
as Chauncey
2022
Then You Run
as Orin
2023
Chicago P.D.
as Shane Sullivan
2014
The Blacklist
as Skip Sutherland
2013
Bull
as Nathan Alexander
2016
Daredevil: Born Again
as Devlin
2025
Seacht
as Michael
2008
Star Trek: Strange New Worlds
as Dr. Roger Korby
2022
The Boy That Never Was
as Dave Garrick
2024