Cillian O'Sullivan
Actor
Born Sep 28, 1989 · New York, USA
Active 2008–present
Cillian O'Sullivan is an American-born Irish actor who has had roles in Then You Run, In From the Cold, Bull, Vikings, 6Degrees, Single-Handed, and Seacht.
Filmography
Daredevil: Born Again (2025) - DevlinThe Lost Princess (2025) - Alec TouatiVikings (2013) - EirikChicago P.D. (2014) - Shane SullivanThe Blacklist (2013) - Skip SutherlandStar Trek: Strange New Worlds (2022) - Dr. Roger KorbyFBI: Most Wanted (2020) - Scot WeitzenBull (2016) - Nathan AlexanderHalo: Nightfall (2014) - Christian Ramsey (uncredited)In From the Cold (2022) - ChaunceyMaze (2017) - BobbyThe Boy That Never Was (2024) - Dave GarrickThen You Run (2023) - OrinMisty Button (2019) - JamesUncle Bill's Barrel (2008) - Tom LynchSeacht (2008) - Michael6Degrees (2012) - Conor Martin