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Portrait of Cillian O'Sullivan

Acting

Cillian O'Sullivan

Career

Active from 2008 to 2025, with up to 1 main title a year.

Leading roles
3
top three billing
Average score
GoodWatch score58/100
Highest rated
Poster for Then You Run
Then You Run
GoodWatch score80/100

What stands out

Compared with the average well-known movie, over 13 of their titles. Select a trait to filter titles.

Energy: 6.0 versus catalog average 4.6EnergyHeart: 4.1 versus catalog average 4.2HeartHumor: 1.7 versus catalog average 2.6HumorWorld: 5.9 versus catalog average 5.6WorldCraft: 6.0 versus catalog average 5.3CraftStyle: 6.4 versus catalog average 5.9Style
Cillian O'Sullivan Catalog average

Rarely in their work

  • Nostalgia
    1.5, average 3.8
  • Cringe Humor
    0.5, average 2.2
  • Absurdist Humor
    0.4, average 2.0
  • Wholesome
    1.9, average 3.4

Main genres

Select a genre to see those titles.

Recurring tags

  • Fast-Paced 2

Works often with

People in at least two of their main titles.

    Movies and TV shows

    17
    Type
    Role
    Score
    Decade
    Genre
    Group by

    2020s

    7 titles · average score 64
    The Lost Princess
    The Lost Princess (2025)
    GoodWatch score 36

    as Alec Touati

    Daredevil: Born Again
    Daredevil: Born Again (2025)
    GoodWatch score 74

    TV show · as Devlin

    The Boy That Never Was
    The Boy That Never Was (2024)
    GoodWatch score 62

    TV show · as Dave Garrick

    Then You Run
    Then You Run (2023)
    GoodWatch score 80

    TV show · as Orin

    In From the Cold
    In From the Cold (2022)
    GoodWatch score 64

    TV show · as Chauncey

    Star Trek: Strange New Worlds
    Star Trek: Strange New Worlds (2022)
    GoodWatch score 76

    TV show · as Dr. Roger Korby

    FBI: Most Wanted
    FBI: Most Wanted (2020)
    GoodWatch score 58

    TV show · as Scot Weitzen

    2010s

    8 titles · average score 64
    Misty Button
    Misty Button (2019)
    GoodWatch score 52

    as James

    Maze
    Maze (2017)
    GoodWatch score 58

    as Bobby

    Bull
    Bull (2016)
    GoodWatch score 52

    TV show · as Nathan Alexander

    Chicago P.D.
    Chicago P.D. (2014)
    GoodWatch score 66

    TV show · as Shane Sullivan

    Halo: Nightfall
    Halo: Nightfall (2014)
    GoodWatch score 62

    as Christian Ramsey (uncredited)

    Vikings
    Vikings (2013)
    GoodWatch score 78

    TV show · as Eirik

    The Blacklist
    The Blacklist (2013)
    GoodWatch score 80

    TV show · as Skip Sutherland

    6Degrees
    6Degrees (2012)

    TV show · as Conor Martin

    2000s

    2 titles
    Uncle Bill's Barrel
    Uncle Bill's Barrel (2008)

    as Tom Lynch

    Seacht
    Seacht (2008)

    TV show · as Michael