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Acting

Mark O'Brien

Acting · Born 1984-05-07 · St. Johns, Newfoundland, Canada

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).

Credits · 42

Film
The Outer Threat
2026 · Daniel Ashford
Film
The Voices of Our Mother
2026 · William
The Copenhagen Test
2025 · Edmund Cobb
Film
Nuremberg
2025 · Colonel John Amen
Film
The Memory Keeper
2025 · Elizeus Carrier
Film
Shadow of God
2025 · Mason Harper
Film
Seven Veils
2025 · Paul
Film
Topper
2025 · Topper
The Sticky
2024 · Charlie
61st Street
2022 · Officer Logan
Film
Blue Bayou
2021 · Ace
Film
The Righteous
2021 · Aaron Smith
Your Honor
2020 · Father Jay
Perry Mason
2020 · Thomas Milligan
Film
Hammer
2019 · Chris Davis
Film
Marriage Story
2019 · Carter Mitchum
The Kelly Clarkson Show
2019 · Self
Film
Ready or Not
2019 · Alex
City on a Hill
2019 · Jimmy Ryan
Film
Goalie
2019 · Terry Sawchuk
Film
State Like Sleep
2019 · Darren
Film
The Front Runner
2018 · Billy Shore
Film
Bad Times at the El Royale
2018 · Larsen Rogers
Film
Kin
2018 · Jake
Film
The Darkest Minds
2018 · Rob Meadows
Film
How It Ends
2018 · Jeremiah
Film
Anon
2018 · Cyrus Frear
Film
Parallel
2018 · Josh
The Last Tycoon
2017 · Max Miner
Film
Arrival
2016 · Captain Marks
Film
Wanderer
2016 · Eric
Film
The Dark Stranger
2016 · Mark
Film
How to Plan an Orgy in a Small Town
2015 · Bruce Buck
Killjoys
2015 · Grayson Hicks
Film
End of Days, Inc.
2015 · Jason
Halt and Catch Fire
2014 · Tom Rendon
Hannibal
2013 · Randall Tier
Film
Grown Up Movie Star
2010 · Will
Republic of Doyle
2010 · Des Courtney
Warehouse 13
2009 · Jerry Hoffler
Film
The One That Got Away
2008 · Tommy Palchek
Film
The Four Horsemen
2008 · Eric Rollins
Mark O'Brien · MediaMark