Cillian O'Sullivan
Known for
Vikings
Eirik
The Blacklist
Skip Sutherland
Chicago P.D.
Shane Sullivan
The Lost Princess
Alec Touati
Bull
Nathan Alexander
Star Trek: Strange New Worlds
Dr. Roger Korby
Daredevil: Born Again
Devlin
Halo: Nightfall
Christian Ramsey (uncredited)
In From the Cold
Chauncey
Misty Button
James
Then You Run
Orin
The Boy That Never Was
Dave Garrick
Maze
Bobby
Seacht
Michael
Uncle Bill's Barrel
Tom Lynch