Mark O'Brien
Profile info
Known forActing
GenderMale
Birthday7 May 1984 (42 years old)
Place of birth St. Johns, Newfoundland, Canada
Known credits59
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).
The Outer Threat
2026 · Daniel Ashford
The Voices of Our Mother
2026 · William
The Voices of Our Mother
2026 · Director
The Voices of Our Mother
2026 · Writer
The Copenhagen Test
2025 · Edmund Cobb
Nuremberg
2025 · Colonel John Amen
The Memory Keeper
2025 · Elizeus Carrier
Shadow of God
2025 · Mason Harper
Seven Veils
2025 · Paul
Topper
2025 · Topper
The Sticky
2024 · Charlie
61st Street
2022 · Officer Logan
Blue Bayou
2021 · Ace
The Righteous
2021 · Aaron Smith
The Righteous
2021 · Director
The Righteous
2021 · Writer
The Righteous
2021 · Executive Producer
Your Honor
2020 · Father Jay
Perry Mason
2020 · Thomas Milligan
Hammer
2019 · Chris Davis
Marriage Story
2019 · Carter Mitchum
The Kelly Clarkson Show
2019 · Self
Ready or Not
2019 · Alex
City on a Hill
2019 · Jimmy Ryan
Goalie
2019 · Terry Sawchuk
Goalie
2019 · Executive Producer
State Like Sleep
2019 · Darren
The Front Runner
2018 · Billy Shore
Bad Times at the El Royale
2018 · Larsen Rogers
Kin
2018 · Jake
The Darkest Minds
2018 · Rob Meadows
How It Ends
2018 · Jeremiah
Anon
2018 · Cyrus Frear
Parallel
2018 · Josh
The Last Tycoon
2017 · Max Miner
Arrival
2016 · Captain Marks
Wanderer
2016 · Eric
Wanderer
2016 · Director
Wanderer
2016 · Producer
The Dark Stranger
2016 · Mark
How to Plan an Orgy in a Small Town
2015 · Bruce Buck
Killjoys
2015 · Grayson Hicks
End of Days, Inc.
2015 · Jason
Dennis
2015 · Dennis
Dennis
2015 · Producer
Halt and Catch Fire
2014 · Tom Rendon
Hannibal
2013 · Randall Tier
Sweetieface
2013 · Sam
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