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
12
Crew Credits
Acting
Movie
Arrival
as Captain Marks
2016
Movie
Marriage Story
as Carter Mitchum
2019
Movie
Ready or Not
as Alex
2019
Movie
Bad Times at the El Royale
as Larsen Rogers
2018
Movie
The Darkest Minds
as Rob Meadows
2018
TV
Hannibal
as Randall Tier
2013
Movie
How It Ends
as Jeremiah
2018
Movie
Anon
as Cyrus Frear
2018
TV
Your Honor
as Father Jay
2020
Movie
Nuremberg
as Colonel John Amen
2025
Movie
Kin
as Jake
2018
TV
Warehouse 13
as Jerry Hoffler
2009
TV
Halt and Catch Fire
as Tom Rendon
2014
TV
Killjoys
as Grayson Hicks
2015
Movie
The Front Runner
as Billy Shore
2018
TV
Perry Mason
as Thomas Milligan
2020
Movie
Blue Bayou
as Ace
2021
TV
City on a Hill
as Jimmy Ryan
2019
Movie
Parallel
as Josh
2018
Movie
How to Plan an Orgy in a Small Town
as Bruce Buck
2015
TV
The Copenhagen Test
as Edmund Cobb
2025
TV
The Sticky
as Charlie
2024
TV
The Kelly Clarkson Show
as Self
2019
TV
The Last Tycoon
as Max Miner
2017
Crew
Movie
The Righteous
Writer
2021
Movie
Goalie
Executive Producer
2019
Movie
Wanderer
Director
2016
Movie
The Voices of Our Mother
Director
2026
Movie
Kathy
Director
2011
Movie
Brad
Producer
2010
Movie
Dennis
Producer
2015
Movie
Better People
Director
Movie
Sweetieface
Director
2013
Movie
Pretty Girls
Director
2008
Movie
Nice People
Director
Movie
Good in the Room
Writer