Name
Cillian O'Sullivan
Known For
Acting
Birthday
1989-09-28 (37 years old)
Place of Birth
New York, USA
Biography
Known For
Halo: Nightfall
(205 Votes)
6.812
Set between the events of Halo 4 and Halo 5: Guardians… Halo: Nightfall tells the dramat...
Relase Date : 5 Feb, 2014
Trailer
Details
The Lost Princess
(47 Votes)
6.277
After an Ayahuasca vision transports him to a haunted castle, Alec meets Hanna who tales h...
Relase Date : 16 Oct, 2025
Trailer
Details
Movies
Tv Shows
- 2025 The Lost Princess as Alec Touati
- 2008 Uncle Bill's Barrel as Tom Lynch
- 2017 Maze as Bobby
- 2019 Misty Button as James
- 2014 Halo: Nightfall as Christian Ramsey (uncredited)
- 2013 Vikings ( 1 episode ) as Eirik
- 2022 In From the Cold ( 8 episodes ) as Chauncey
- 2023 Then You Run ( 8 episodes ) as Orin
- 2014 Chicago P.D. ( 1 episode ) as Shane Sullivan
- 2013 The Blacklist ( 2 episodes ) as Skip Sutherland
- 2016 Bull ( 1 episode ) as Nathan Alexander
- 2025 Daredevil: Born Again ( 3 episodes ) as Devlin
- 2008 Seacht ( 8 episodes ) as Michael
- 2022 Star Trek: Strange New Worlds ( 4 episodes ) as Dr. Roger Korby
- 2024 The Boy That Never Was ( 3 episodes ) as Dave Garrick
- 2020 FBI: Most Wanted ( 1 episode ) as Scot Weitzen
- 2012 6Degrees ( 18 episodes ) as Conor Martin
