Mark O'Brien
Known for Acting
Born May 7, 1984
Place of Birth 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).
Filmography
Ready or Not
2019
as Alex Le Domas
Arrival
2016
as Captain Marks
Nuremberg
2025
as Colonel John Amen
Anon
2018
as Cyrus Frear
Marriage Story
2019
as Carter Mitchum
Kin
2018
as Jake
The Darkest Minds
2018
as Rob Meadows
Bad Times at the El Royale
2018
as Larsen Rogers
How It Ends
2018
as Jeremiah
The Front Runner
2018
as Billy Shore
Parallel
2018
as Josh
Shadow of God
2025
as Mason Harper
Seven Veils
2025
as Paul
Blue Bayou
2021
as Ace
How to Plan an Orgy in a Small Town
2015
as Bruce Buck
Hammer
2019
as Chris Davis
Goalie
2019
as Terry Sawchuk
Goalie
2019
Executive Producer
State Like Sleep
2019
as Darren
The Four Horsemen
2008
as Eric Rollins
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