Acting
Mark O'Brien
Born May 7, 1984 St. Johns, Newfoundland, Canada
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).
Filmography
4.0
The Outer Threat
2026·Science Fiction
5.8
The Voices of Our Mother
2026·Horror
7.6
Nuremberg
2025·History
—
The Memory Keeper
2025·Science Fiction
5.7
Shadow of God
2025·Horror
5.7
Seven Veils
2025·Drama
5.3
Topper
2025·Drama
7.4
Blue Bayou
2021·Drama
6.3
The Righteous
2021·Drama
5.4
Hammer
2019·Crime
7.7
Marriage Story
2019·Drama
7.1
Ready or Not
2019·Horror
6.9
Goalie
2019·Drama
4.7
State Like Sleep
2019·Drama
5.9
The Front Runner
2018·Drama
6.8
Bad Times at the El Royale
2018·Thriller
6.1
Kin
2018·Science Fiction
7.0
The Darkest Minds
2018·Action
5.3
How It Ends
2018·Science Fiction
6.0
Anon
2018·Science Fiction
6.0
Parallel
2018·Science Fiction
7.6
Arrival
2016·Drama
—
Wanderer
2016·Drama
4.9
The Dark Stranger
2016·Drama