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).
55 acting credits · 8 directing credits
Acting · 55
The Kelly Clarkson Show
2019
Hannibal
2013
Warehouse 13
2009
Ready or Not
2019
Republic of Doyle
2010
Halt and Catch Fire
2014
Nuremberg
2025
Perry Mason
2020
Arrival
2016
Killjoys
2015
Your Honor
2020
City on a Hill
2019
The Copenhagen Test
2025
Marriage Story
2019
Bad Times at the El Royale
2018
The Last Tycoon
2017
61st Street
2022
The Darkest Minds
2018
The Sticky
2024
Kin
2018
How It Ends
2018
Anon
2018
Shadow of God
2025
The Front Runner
2018
Parallel
2018
Seven Veils
2025
Blue Bayou
2021
How to Plan an Orgy in a Small Town
2015
Goalie
2019
Hammer
2019
The One That Got Away
2008
State Like Sleep
2019
The Righteous
2021
Heartless Disappearance Into Labrador Seas
2008
The Voices of Our Mother
2026
Grown Up Movie Star
2010
The Four Horsemen
2008
Topper
2025
Beat Down
2012
The Outer Threat
—
The Memory Keeper
2025
The Dark Stranger
2016
End of Days, Inc.
2015
Dennis
2015
Nice People
—
Snarbuckled
2010
Brad
2010
Quiet at Dawn
2009
Mum's the Word
2009
Sweetieface
2013
Better People
—
Epilogue
2008
Cut from the Same Cloth
2009
Wanderer
2016
Good in the Room
—
