Mark O'Brien
Born
5/7/1984
St. Johns, Newfoundland, Canada
Mark O'Brien
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).
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).
Known For28 Movies
Arrival
2016
★7.6
Ready or Not
2019
★7.1
Nuremberg
2025
★7.6
The Outer Threat
2026
★5.8
Bad Times at the El Royale
2018
★6.8
Marriage Story
2019
★7.7
The Darkest Minds
2018
★7.0
How It Ends
2018
★5.3
Kin
2018
★6.1
Anon
2018
★6.0
Parallel
2018
★6.0
The Front Runner
2018
★5.9
The Dark Stranger
2016
★4.9
Seven Veils
2025
★5.6
Blue Bayou
2021
★7.4
Shadow of God
2025
★5.7
How to Plan an Orgy in a Small Town
2015
★5.1
The Righteous
2021
★6.3
Goalie
2019
★6.8
The Voices of Our Mother
2026
★6.4
State Like Sleep
2019
★4.7
The Four Horsemen
2008
★5.9
Hammer
2019
★5.4
The One That Got Away
2008
★4.3
Topper
2025
★5.3
End of Days, Inc.
2015
★5.8
Grown Up Movie Star
2010
★5.1
Wanderer
2016
★5.0