Mark O'Brien
Personal Info
Known For
Acting
Gender
Male
Birthday
1984-05-07
Place of Birth
St. Johns, Newfoundland, Canada
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).
Also Known For
Seven Veils
Mar 07, 2025
The Four Horsemen
Mar 18, 2008
Grown Up Movie Star
Oct 20, 2009
Cut from the Same Cloth
Jan 01, 2009
Heartless Disappearance Into Labrador Seas
Sep 09, 2008
Shadow of God
Mar 26, 2025
Snarbuckled
Sep 18, 2010
The Dark Stranger
Jul 15, 2016
Nuremberg
Nov 06, 2025
End of Days, Inc.
Apr 24, 2015
The Voices of Our Mother
Beat Down
Aug 03, 2012
Arrival
Nov 10, 2016
Anon
May 03, 2018
State Like Sleep
Jan 04, 2019
Kin
Aug 29, 2018
Parallel
Apr 10, 2018
The Darkest Minds
Jul 25, 2018
How to Plan an Orgy in a Small Town
Sep 19, 2015
Bad Times at the El Royale
Oct 04, 2018
Marriage Story
Sep 28, 2019
The Front Runner
Nov 06, 2018
How It Ends
Jul 13, 2018
Goalie
Mar 01, 2019
Hammer
Dec 05, 2019
Ready or Not
Aug 21, 2019
Blue Bayou
Sep 10, 2021
The Righteous
Aug 15, 2021
Mum's the Word
Oct 23, 2009
Epilogue
Jun 27, 2008
Brad
Jul 24, 2010
The Embers and the Stars
Dennis
Apr 18, 2015
Falsehood
Oct 26, 2025
Quiet at Dawn
Sep 01, 2009
Topper
Mar 04, 2025
The One That Got Away
Apr 20, 2008
Better People
Sweetieface
Jan 01, 2013
Wanderer
Oct 04, 2016
Nice People
Perry Mason
Jun 21, 2020
Republic of Doyle
Jan 06, 2010
The Last Tycoon
Jul 28, 2017
61st Street
Apr 10, 2022
Killjoys
Jun 19, 2015
The Kelly Clarkson Show
Sep 09, 2019
City on a Hill
Jun 16, 2019
Hannibal
Apr 04, 2013
Warehouse 13
Jul 07, 2009
Halt and Catch Fire
Jun 01, 2014
Your Honor
Dec 06, 2020
The Copenhagen Test
Dec 27, 2025
