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Mark O'Brien

Acting

Born
May 7, 1984 (age 42)
Place of Birth
St. Johns, Newfoundland, Canada
Movies
44
TV Shows
14

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).

Known For

Arrival★7.6
Arrival
2016
Marriage Story★7.7
Marriage Story
2019
Ready or Not★7.1
Ready or Not
2019
Bad Times at the El Royale★6.8
Bad Times at the El Royale
2018
Hannibal★8.3
Hannibal
2013
The Darkest Minds★7.0
The Darkest Minds
2018
How It Ends★5.3
How It Ends
2018
Anon★6.0
Anon
2018
Your Honor★8.0
Your Honor
2020
Nuremberg★7.6
Nuremberg
2025
Kin★6.1
Kin
2018
Warehouse 13★7.7
Warehouse 13
2009
Halt and Catch Fire★7.9
Halt and Catch Fire
2014
Killjoys★6.9
Killjoys
2015
Perry Mason★7.2
Perry Mason
2020
The Front Runner★5.9
The Front Runner
2018
Blue Bayou★7.4
Blue Bayou
2021
City on a Hill★7.3
City on a Hill
2019
Parallel★6.0
Parallel
2018
How to Plan an Orgy in a Small Town★5.1
How to Plan an Orgy in a Small Town
2015

Movies

The Outer Threat★5.8
The Outer Threat
2026
The Voices of Our Mother★6.3
The Voices of Our Mother
2026
Nuremberg★7.6
Nuremberg
2025
The Memory Keeper★7.0
The Memory Keeper
2025
Shadow of God★5.6
Shadow of God
2025
Seven Veils★5.5
Seven Veils
2025
Topper★5.3
Topper
2025
Blue Bayou★7.4
Blue Bayou
2021
The Righteous★6.3
The Righteous
2021
Hammer★5.5
Hammer
2019
Marriage Story★7.7
Marriage Story
2019
Ready or Not★7.1
Ready or Not
2019
Goalie★6.8
Goalie
2019
State Like Sleep★4.6
State Like Sleep
2019
The Front Runner★5.9
The Front Runner
2018
Bad Times at the El Royale★6.8
Bad Times at the El Royale
2018
Kin★6.1
Kin
2018
The Darkest Minds★7.0
The Darkest Minds
2018
How It Ends★5.3
How It Ends
2018
Anon★6.0
Anon
2018
Parallel★6.0
Parallel
2018
Arrival★7.6
Arrival
2016
Wanderer★5.0
Wanderer
2016
The Dark Stranger★4.9
The Dark Stranger
2016

TV Shows

The Copenhagen Test★6.6
The Copenhagen Test
2025
The Sticky★7.2
The Sticky
2024
61st Street★6.2
61st Street
2022
Your Honor★8.0
Your Honor
2020
Perry Mason★7.2
Perry Mason
2020
The Kelly Clarkson Show★6.2
The Kelly Clarkson Show
2019
City on a Hill★7.3
City on a Hill
2019
The Last Tycoon★7.0
The Last Tycoon
2017
Killjoys★6.9
Killjoys
2015
Halt and Catch Fire★7.9
Halt and Catch Fire
2014
Hannibal★8.3
Hannibal
2013
Republic of Doyle★7.0
Republic of Doyle
2010
Warehouse 13★7.7
Warehouse 13
2009
Stillwater
Stillwater
Mark O'Brien · Movies Box