Portrait of Mark O'Brien

Mark O'Brien

Acting

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).

Born: May 7, 1984

Place of Birth: St. Johns, Newfoundland, Canada

Filmography

2025
Nuremberg

as Colonel John Amen

2025
Falsehood

as Elizeus Carrier

2025
Shadow of God

as Mason Harper

2025
2025
Topper

as Topper

2024
The Sticky

as Charlie

2022
61st Street

as Officer Logan

2021
2021
The Righteous

as Aaron Smith

2020
Your Honor

as Father Jay

2020
Perry Mason

as Thomas Milligan

2019
Hammer

as Chris Davis

2019
Marriage Story

as Carter Mitchum

2019
Ready or Not

as Alex Le Domas

2019
City on a Hill

as Jimmy Ryan

2019
Goalie

as Terry Sawchuk

2019
2018
The Front Runner

as Billy Shore

2018
2018
Kin

as Jake

2018
The Darkest Minds

as Rob Meadows

2018
How It Ends

as Jeremiah

2018
Anon

as Cyrus Frear

2018
Parallel

as Josh

2017
The Last Tycoon

as Max Miner

2016
Arrival

as Captain Marks

2016
Wanderer

as Eric

2015
Killjoys

as Grayson Hicks

2015
2015
Dennis

as Dennis

2014
Halt and Catch Fire

as Tom Rendon

2013
Hannibal

as Randall Tier

2012
Beat Down

as Michael

2010
Snarbuckled

as Jacob O'Higgins

2010
Republic of Doyle

as Des Courtney

2009
Warehouse 13

as Jerry Hoffler

2008
The One That Got Away

as Tommy Palchek

2008
The Four Horsemen

as Eric Rollins

    Mark O'Brien - Filmography | 321movies