Cillian O'Sullivan

Known For

Vikings
The Blacklist
Chicago P.D.
Bull
Halo: Nightfall
In From the Cold
Birth Location
Born

Movies

The Lost Princess as Alec Touati
2023
Misty Button as James
2019
Maze as Bobby
2017
Halo: Nightfall as Christian Ramsey (uncredited)
2014
Cillian O'Sullivan hasn't worked on any movies or TV shows