Cillian O'Sullivan

Actor

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Cillian O'Sullivan

Actor

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Credits
30 titles

Past Film & Video (11 titles)	Budget	Opening Weekend	Gross (US & Canada)	Gross (Worldwide)
The Lost Princess (2025) Alec Touati Alec Touati See fewer				$10K
Motions (2022) (Short) - Garrett Garrett See fewer	$10K
Lizzy on Leroy Street (2019) (Short) - Jack Jack See fewer
Misty Button (2019) James Sheehan James Sheehan See fewer
Maze (2017) Bobby Bobby See fewer		$8K	$44K	$1.1MM
An Actor Prepares (2014) (Short) - Billy Billy See fewer
Thumb Wars (2014) (Short) - Him Him See fewer
Empire State (2014) (Short) - Michael Michael See fewer
Respite at Christmas (2013) (Short) - John John See fewer	£4K
An Cosc (2009) (Short) - Sean Daly Sean Daly See fewer	€20K
Uncle Bill's Barrel (2008) (Short) - Tom Lynch Tom Lynch See fewer

See all past film & video

Past Television (17 titles)	Episodes
Star Trek: Strange New Worlds (2025) (TV Series) - Dr. Roger Korby (2 episodes, 2025) Dr. Roger Korby (2 episodes, 2025) See fewer Through the Lens of Time (Aug 7, 2025) Season 3, Episode 5 - Dr. Roger Korby Dr. Roger Korby See fewer Wedding Bell Blues (Jul 17, 2025) Season 3, Episode 2 - Dr. Roger Korby Dr. Roger Korby See fewer	2
Daredevil: Born Again (2025) (TV Series) - Devlin (3 episodes, 2025) Devlin (3 episodes, 2025) See fewer With Interest (Mar 25, 2025) Season 1, Episode 5 - Devlin Devlin See fewer See more See fewer Loading	3
The Boy That Never Was (2024) (TV Series) - Dave Garrick (3 episodes, 2024) Dave Garrick (3 episodes, 2024) See fewer Episode #1.4 (Sep 22, 2024) Season 1, Episode 4 - Dave Garrick Dave Garrick See fewer See more See fewer Loading	3
Then You Run (2023) (TV Series) - Orin (8 episodes, 2023) Orin (8 episodes, 2023) See fewer It Will Get Darker (Jul 28, 2023) Season 1, Episode 8 - Orin Orin See fewer See more See fewer Loading	8
In from the Cold (2022) (TV Series) - Chauncey (8 episodes, 2022) Chauncey (8 episodes, 2022) See fewer Motherland (Jan 28, 2022) Season 1, Episode 8 - Chauncey Chauncey See fewer See more See fewer Loading	8
Chicago P.D. (2020) (TV Series) - Shane Sullivan (1 episode, 2020) Shane Sullivan (1 episode, 2020) See fewer Intimate Violence (Mar 4, 2020) Season 7, Episode 16 - Shane Sullivan Shane Sullivan See fewer	1
FBI: Most Wanted (2020) (TV Series) - Scot Weitzen (1 episode, 2020) Scot Weitzen (1 episode, 2020) See fewer Invisible (Feb 11, 2020) Season 1, Episode 5 - Scot Weitzen Scot Weitzen See fewer	1
The Blacklist (2019) (TV Series) - Skip Sutherland (2 episodes, 2019) Skip Sutherland (2 episodes, 2019) See fewer The Hawaladar (No. 162) (Nov 22, 2019) Season 7, Episode 8 - Skip Sutherland Skip Sutherland See fewer Hannah Hayes (No. 125) (Nov 15, 2019) Season 7, Episode 7 - Skip Sutherland Skip Sutherland See fewer	2
Bull (2019) (TV Series) - Nathan Alexander (1 episode, 2019) Nathan Alexander (1 episode, 2019) See fewer Billboard Justice (Oct 21, 2019) Season 4, Episode 5 - Nathan Alexander Nathan Alexander See fewer	1
Taken Down (2018) (TV Series) - Dunnie (5 episodes, 2018) Dunnie (5 episodes, 2018) See fewer Episode 6 (Dec 9, 2018) Season 1, Episode 6 - Dunnie Dunnie See fewer See more See fewer Loading	5
Vikings (2016) (TV Series) - Eirik (1 episode, 2016) Eirik (1 episode, 2016) See fewer A Good Treason (Feb 18, 2016) Season 4, Episode 1 - Eirik Eirik See fewer	1
6Degrees (2012–2015) (TV Series) - Conor Martin (18 episodes, 2012) Conor Martin (18 episodes, 2012) See fewer Episode #3.6 (Apr 29, 2015) Season 3, Episode 6 - Conor Martin Conor Martin See fewer See more See fewer Loading	18
Halo: Nightfall (2014) (TV Mini-series) - Christian Ramsey (1 episode, 2014) Christian Ramsey (1 episode, 2014) See fewer It's Only Just Beginning (Nov 11, 2014) Season 1, Episode 1 - Christian Ramsey (uncredited) Christian Ramsey (uncredited) See fewer	1
Scúp (2013) (TV Series) - Patrick (1 episode, 2013) Patrick (1 episode, 2013) See fewer The Raid (Mar 20, 2013) Season 1, Episode 4 - Patrick (as Cillian O'Suilleabhain) Patrick (as Cillian O'Suilleabhain) See fewer	1
Seacht (2010–2011) (TV Series) - Micheal (6 episodes, 2010) Micheal (6 episodes, 2010) See fewer Episode #4.8 (Feb 21, 2011) Season 4, Episode 8 - Micheal (as Cillian Ó Súilleabháin) Micheal (as Cillian Ó Súilleabháin) See fewer See more See fewer Loading	6
Single-Handed (2009) (TV Series) - Andy (2 episodes, 2009) Andy (2 episodes, 2009) See fewer The Drowning Man: Part 2 (Apr 13, 2009) Season 3, Episode 2 - Andy Andy See fewer The Drowning Man: Part 1 (Apr 12, 2009) Season 3, Episode 1 - Andy Andy See fewer	2
The Running Mate (2007) (TV Mini-series) - Danny Flynn (4 episodes, 2007) Danny Flynn (4 episodes, 2007) See fewer Episode #1.4 (Oct 17, 2007) Season 1, Episode 4 - Danny Flynn (as Cillian O'Suilleabhain) Danny Flynn (as Cillian O'Suilleabhain) See fewer See more See fewer Loading	4

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Self (2 titles)
In Creative Company (2022) (Podcast Series) - Self (1 episode, 2022) Self (1 episode, 2022) See fewer Cillian O'Sullivan on In From the Cold (Feb 3, 2022) Season 3, Episode 38 - Self Self See fewer
No Rest for the Weekend (2019–2021) (TV Series) - Self (2 episodes, 2019) Self (2 episodes, 2019) See fewer Fall Film Festial Preview (Oct 6, 2021) Season 10, Episode 4 - Self Self See fewer Soho International Film Festival 2019 Recap (Aug 21, 2019) Season 5, Episode 15 - Self Self See fewer

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