Mark O'Brien
Birthday: 1984-05-07 | Place of Birth: CanadaMark O'Brien (born May 7, 1984) is a Canadian actor and director. He is best known for playing the role of Des Courtney in Republic of Doyle and Tom Rendon in Halt and Catch Fire.
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Known For
Acting
Year
Title
Role
2025
Shadow of God
as Mason Harper
2025
Seven Veils
as Paul
2025
Topper
as Topper
2021
The Righteous
as Aaron Smith
2021
Blue Bayou
as Ace
2019
Ready or Not
as Alex Le Domas
2019
Hammer
as Chris Davis
2019
State Like Sleep
as Darren
2019
Goalie
as Terry Sawchuk
2018
The Front Runner
as Billy Shore
2018
Anon
as Cyrus Frear
2018
How It Ends
as Jeremiah
2018
Parallel
as Josh
2018
The Darkest Minds
as Rob Meadows
2017
The Last Tycoon
as Max Miner
2016
How to Plan an Orgy in a Small Town
as Bruce Buck
2016
Arrival
as Captain Marks
2016
The Dark Stranger
as Mark
2015
Dennis
as Dennis
2015
End of Days, Inc.
as Jason
2012
Beat Down
as Michael
2010
Brad
as Brad
2010
Republic of Doyle
as Des Courtney
2010
Snarbuckled
as Jacob O'Higgins
2009
Mum's the Word
as Curtis
2009
Cut from the Same Cloth
as Jack Cochrane
2009
Quiet at Dawn
as Watts
2009
Grown Up Movie Star
as Will
