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).
Directed Films
Also Appeared In
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