Overview
Known for
Acting
Gender
Male
Birthday
May 07, 1984 (41 years old)
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).
Acting
2025
Shadow of God
2025
Seven Veils
2025
Topper
2021
Blue Bayou
2021
The Righteous
2019
Hammer
2019
Marriage Story
2019
Ready or Not
2019
Goalie
2019
State Like Sleep
2018
The Front Runner
2018
Bad Times at the El Royale
2018
Kin
2018
The Darkest Minds
2018
How It Ends
2018
Anon
2018
Parallel
2017
The Last Tycoon
2016
Arrival
2016
The Dark Stranger
2015
How to Plan an Orgy in a Small Town
2015
End of Days, Inc.
2015
Dennis
2013
Sweetieface
2012
Beat Down
2010
Snarbuckled
2010
Brad
2010
Republic of Doyle
2009
Mum's the Word
2009
Grown Up Movie Star
2009
Quiet at Dawn
2009
Cut from the Same Cloth
2008
Heartless Disappearance Into Labrador Seas
2008
Epilogue
2008
The Four Horsemen