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Mark O'Brien

Male
May 7, 1984
St. Johns, Newfoundland, Canada
Acting
Mark O’Brien

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).

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Highest-Rated Video
Filmography
Movies
TV Series
Upcoming
Nuremberg
0.00
movie2025HungaryUnited States
Character: Colonel John AmenCredit: Acting
Shadow of God
6.40
movie2025Canada
Character: Mason HarperCredit: Acting
Seven Veils
6.60
movie2025Canada
Character: PaulCredit: Acting
Topper
0.00
movie2025United States
Character: TopperCredit: Acting
Blue Bayou
7.10
movie2021CanadaUnited States
Character: AceCredit: Acting
The Righteous
6.80
movie2021CanadaUnited States
Character: Aaron Smith, Director, WriterCredit: Acting, Director, Executive Producer, Writer
Hammer
6.60
movie2019CanadaUnited States
Character: Chris DavisCredit: Acting
Marriage Story
7.90
movie2019UK
Character: Carter MitchumCredit: Acting
Ready or Not
6.80
movie2019CanadaUnited States
Character: Alex Le DomasCredit: Acting
Goalie
6.80
movie2019Canada
Character: Terry SawchukCredit: Acting, Executive Producer
State Like Sleep
6.30
movie2019United States
Character: DarrenCredit: Acting
The Front Runner
6.30
movie2018United States
Character: Billy ShoreCredit: Acting
Bad Times at the El Royale
7.10
movie2018United States
Character: Larsen RogersCredit: Acting
Kin
6.00
movie2018United States
Character: JakeCredit: Acting
The Darkest Minds
5.90
movie2018United States
Character: Rob MeadowsCredit: Acting
How It Ends
5.20
movie2018CanadaUnited States
Character: JeremiahCredit: Acting
Anon
6.20
movie2018UKUnited States
Character: Cyrus FrearCredit: Acting
Parallel
6.30
movie2018CanadaUnited States
Character: JoshCredit: Acting
Arrival
7.90
movie2016United States
Character: Captain MarksCredit: Acting
Wanderer
0.00
movie2016United States
Character: EricCredit: Acting, Director, Producer