Cillian O'Sullivan

Person

Cillian O'Sullivan

Acting 36 September 28, 1989

New York, USA

IMDb

Known for

Popular titles

Vikings

Vikings

8.1 2013 TV Show
The Blacklist

The Blacklist

7.6 2013 TV Show
Chicago P.D.

Chicago P.D.

8.4 2014 TV Show
Daredevil: Born Again

Daredevil: Born Again

8.2 2025 TV Show
Star Trek: Strange New Worlds

Star Trek: Strange New Worlds

7.9 2022 TV Show
FBI: Most Wanted

FBI: Most Wanted

7.6 2020 TV Show
Bull

Bull

7.1 2016 TV Show
Halo: Nightfall

Halo: Nightfall

6.8 2014 Movie
In From the Cold

In From the Cold

6.7 2022 TV Show
Maze

Maze

5.8 2017 Movie
The Lost Princess

The Lost Princess

6.3 2025 Movie
The Boy That Never Was

The Boy That Never Was

6.3 2024 TV Show

Filmography

Movies and shows, newest first

  1. 2025
    The Lost Princess

    Movie Alec Touati

  2. 2025
    Daredevil: Born Again

    TV show Devlin

  3. 2024
    The Boy That Never Was

    TV show Dave Garrick

  4. 2023
    Then You Run

    TV show Orin

  5. 2022
    Star Trek: Strange New Worlds

    TV show Dr. Roger Korby

  6. 2022
    In From the Cold

    TV show Chauncey

  7. 2020
    FBI: Most Wanted

    TV show Scot Weitzen

  8. 2019
    Misty Button

    Movie James

  9. 2017
    Maze

    Movie Bobby

  10. 2016
    Bull

    TV show Nathan Alexander

  11. 2014
    Halo: Nightfall

    Movie Christian Ramsey (uncredited)

  12. 2014
    Chicago P.D.

    TV show Shane Sullivan

  13. 2013
    The Blacklist

    TV show Skip Sutherland

  14. 2013
    Vikings

    TV show Eirik

  15. 2012
    6Degrees

    TV show Conor Martin

  16. 2008
    Uncle Bill's Barrel

    Movie Tom Lynch

More credits
  1. 2008
    Seacht

    TV show Michael