
Acting
Cillian O'Sullivan
New York, USABorn 1989 (36 years old)
4
Films
9
TV Shows
Known For
13 Credits
The Blacklist
as Skip Sutherland
2013

Vikings
as Eirik
2013

Chicago P.D.
as Shane Sullivan
2014

Bull
as Nathan Alexander
2016

Daredevil: Born Again
as Devlin
2025

Star Trek: Strange New Worlds
as Dr. Roger Korby
2022

The Lost Princess
as Alec Touati
2025

In From the Cold
as Chauncey
2022

Then You Run
as Orin
2023

Halo: Nightfall
as Christian Ramsey (uncredited)
2014

The Boy That Never Was
as Dave Garrick
2024

Maze
as Bobby
2017