Mark O'Brien
Acting
Biography
Mark O'Brien (born May 7th, 1984) is a Canadian actor and director. He is best known for playing the role of Des Courtney in Republic of Doyle (2010) and Tom Rendon in Halt and Catch Fire (2014).
Notable Works
Prominent titles featuring Mark O'Brien
Filmography
Acting (44)
2026
The Outer Threatas Daniel Ashford
5.6
2026
The Voices of Our Motheras William
6.4
2025
Nurembergas Colonel John Amen
7.6
2025
The Memory Keeperas Elizeus Carrier
7.0
2025
Shadow of Godas Mason Harper
5.7
2025
Seven Veilsas Paul
5.5
2025
Topperas Topper
5.3
2021
Blue Bayouas Ace
7.4
2021
The Righteousas Aaron Smith
6.3
2019
Hammeras Chris Davis
5.4
2019
Marriage Storyas Carter Mitchum
7.7
2019
Ready or Notas Alex
7.1
2019
Goalieas Terry Sawchuk
6.8
2019
State Like Sleepas Darren
4.7
2018
The Front Runneras Billy Shore
5.9
2018
Bad Times at the El Royaleas Larsen Rogers
6.8
2018
Kinas Jake
6.1
2018
The Darkest Mindsas Rob Meadows
7.0
2018
How It Endsas Jeremiah
5.3
2018
Anonas Cyrus Frear
6.0
2018
Parallelas Josh
6.0
2016
Arrivalas Captain Marks
7.6
2016
Wandereras Eric
5.0
2016
The Dark Strangeras Mark
4.9
2015
How to Plan an Orgy in a Small Townas Bruce Buck
5.1
2015
End of Days, Inc.as Jason
5.8
2015
Dennisas Dennis
2013
Sweetiefaceas Sam
2012
Beat Downas Michael
2010
Snarbuckledas Jacob O'Higgins
2010
Bradas Brad
2010
Grown Up Movie Staras Will
5.1
2009
Mum's the Wordas Curtis
2009
Quiet at Dawnas Watts
2009
Cut from the Same Clothas Jack Cochrane
2008
2008
Epilogueas Henry
2008
The One That Got Awayas Tommy Palchek
4.3
2008
The Four Horsemenas Eric Rollins
5.9
—
Better Peopleas John
—
Good in the Roomas Charlie
—
Somaas Paul
Production & Directing (25)
2026
The Voices of Our MotherDirector
6.4
2026
The Voices of Our MotherWriter
6.4
2021
The RighteousExecutive Producer
6.3
2021
The RighteousDirector
6.3
2021
The RighteousWriter
6.3
2019
GoalieExecutive Producer
6.8
2016
WandererDirector
5.0
2016
WandererProducer
5.0
2015
DennisProducer
2013
SweetiefaceDirector
2013
SweetiefaceProducer
2013
SweetiefaceEditor
2011
KathyDirector
2010
BradProducer
2010
BradEditor
2008
Pretty GirlsDirector
2008
Pretty GirlsWriter
2008
Pretty GirlsEditor
2008
Pretty GirlsCinematography
—
Better PeopleDirector
—
Better PeopleWriter
—
Better PeopleEditor
—
Nice PeopleDirector
—
Good in the RoomWriter
—
Good in the RoomExecutive Producer