Actor
Mark O'Brien
42 years · St. Johns, Newfoundland, Canada · 35 films
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).
Coming next
Best known for
Filmography 34
The Outer Threat
2026 · Daniel Ashford
The Voices of Our Mother
2026 · William, Director
On AMC+
Nuremberg
2025 · Colonel John Amen
On Netflix
The Memory Keeper
2025 · Elizeus Carrier
Shadow of God
2025 · Mason Harper
Seven Veils
2025 · Paul
Topper
2025 · Topper
Blue Bayou
2021 · Ace
On USA Network
The Righteous
2021 · Aaron Smith, Writer
On AMC+
Hammer
2019 · Chris Davis
Marriage Story
2019 · Carter Mitchum
On Netflix
Ready or Not
2019 · Alex
On FXNow
Goalie
2019 · Terry Sawchuk
State Like Sleep
2019 · Darren
On fuboTV
The Front Runner
2018 · Billy Shore
Bad Times at the El Royale
2018 · Larsen Rogers
Kin
2018 · Jake
The Darkest Minds
2018 · Rob Meadows
On Cinemax Amazon Channel
How It Ends
2018 · Jeremiah
Anon
2018 · Cyrus Frear
On Netflix
Parallel
2018 · Josh
On Hoopla
Arrival
2016 · Captain Marks
On Kanopy
Wanderer
2016 · Eric, Director
The Dark Stranger
2016 · Mark
On fuboTV