Cillian O'Sullivan

    Known For

    Acting

    Cillian O'Sullivan

    Biography

    We don't have a biography for Cillian O'Sullivan

    Known For

    • Vikings

      Vikings

      2013

    • The Blacklist

      The Blacklist

      2013

    • Chicago P.D.

      Chicago P.D.

      2014

    • Daredevil: Born Again

      Daredevil: Born Again

      2025

    • Bull

      Bull

      2016

    • Halo: Nightfall

      Halo: Nightfall

      2014

    • In From the Cold

      In From the Cold

      2022

    • Maze

      Maze

      2017

    • Then You Run

      Then You Run

      2023

    • The Boy That Never Was

      The Boy That Never Was

      2024

    • Misty Button

      Misty Button

      2019

    • Blue Moon

      Blue Moon

      2025

    • The Lost Princess

      The Lost Princess

      2025