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Mark O'Brien
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Mark O'Brien

Acting
Born: May 7, 1984 in St. Johns, Newfoundland, Canada

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).

Filmography41 TITLES
Ready or Not
7.0
Ready or Not2019
Nuremberg
7.4
Nuremberg2025
Arrival
7.6
Arrival2016
Marriage Story
7.7
Marriage Story2019
Bad Times at the El Royale
6.8
Bad Times at the El Royale2018
The Darkest Minds
7.0
The Darkest Minds2018
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Kin
6.1
Kin2018
Anon
6.0
Anon2018
How It Ends
5.3
How It Ends2018
Seven Veils
5.6
Seven Veils2025
Shadow of God
5.7
Shadow of God2025
Parallel
6.0
Parallel2018
How to Plan an Orgy in a Small Town
5.1
How to Plan an Orgy in a Small Town2015
The Front Runner
5.9
The Front Runner2018
Blue Bayou
7.5
Blue Bayou2021
Hammer
5.4
Hammer2019
The Four Horsemen
3.8
The Four Horsemen2008
State Like Sleep
4.7
State Like Sleep2019
Goalie
7.0
Goalie2019
The Righteous
6.2
The Righteous2021
Topper
5.3
Topper2025
The One That Got Away
4.3
The One That Got Away2008
Grown Up Movie Star
5.1
Grown Up Movie Star2010
Beat Down
Beat Down2012
The Outer Threat
The Outer Threat
Heartless Disappearance Into Labrador Seas
Heartless Disappearance Into Labrador Seas2008
The Dark Stranger
4.9
The Dark Stranger2016
The Voices of Our Mother
The Voices of Our Mother
Falsehood
Falsehood2025
Dennis
Dennis2015
Cut from the Same Cloth
Cut from the Same Cloth2009
Nice People
Nice People
Brad
Brad2010
Snarbuckled
Snarbuckled2010
Quiet at Dawn
Quiet at Dawn2009
Mum's the Word
Mum's the Word2009
End of Days, Inc.
5.7
End of Days, Inc.2015
Better People
Better People
Epilogue
Epilogue2008
Wanderer
Wanderer2016
Sweetieface
Sweetieface2013