Mark O'Brien
Acting
Born 1984-05-07 · St. Johns, Newfoundland, Canada
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).
Filmography
Nuremberg
Nov 6, 2025
Falsehood
Oct 26, 2025
Shadow of God
Mar 26, 2025
Seven Veils
Mar 7, 2025
Topper
Mar 4, 2025
Blue Bayou
Sep 10, 2021
The Righteous
Aug 15, 2021
Hammer
Dec 5, 2019
Marriage Story
Sep 28, 2019
Ready or Not
Aug 21, 2019
Goalie
Mar 1, 2019
State Like Sleep
Jan 4, 2019
The Front Runner
Nov 6, 2018
Bad Times at the El Royale
Oct 4, 2018
Kin
Aug 29, 2018
The Darkest Minds
Jul 25, 2018
How It Ends
Jul 13, 2018
Anon
May 3, 2018
Parallel
Apr 10, 2018
Arrival
Nov 10, 2016
Wanderer
Oct 4, 2016
The Dark Stranger
Jul 15, 2016
How to Plan an Orgy in a Small Town
Sep 19, 2015
End of Days, Inc.
Apr 24, 2015
Dennis
Apr 18, 2015
Beat Down
Aug 3, 2012
Snarbuckled
Sep 18, 2010
Grown Up Movie Star
Oct 20, 2009
Heartless Disappearance Into Labrador Seas
Sep 9, 2008
The One That Got Away
Apr 20, 2008