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Mark O'Brien
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Mark O'Brien

Acting
Born: May 7, 1984 in St. Johns, Newfoundland, Canada

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).

All Credits56 Titles

Film

43 Titles
Nuremberg
7.5
FILM
Nuremberg2025
Ready or Not
7.1
FILM
Ready or Not2019
Arrival
7.6
FILM
Arrival2016
Marriage Story
7.7
FILM
Marriage Story2019
Bad Times at the El Royale
6.8
FILM
Bad Times at the El Royale2018
The Darkest Minds
7.0
FILM
The Darkest Minds2018
Kin
6.1
FILM
Kin2018
How It Ends
5.3
FILM
How It Ends2018
Anon
6.0
FILM
Anon2018
Seven Veils
5.6
FILM
Seven Veils2025
Shadow of God
5.7
FILM
Shadow of God2025
Parallel
6.0
FILM
Parallel2018
Blue Bayou
7.4
FILM
Blue Bayou2021
The Front Runner
5.9
FILM
The Front Runner2018
Goalie
7.0
FILM
Goalie2019
How to Plan an Orgy in a Small Town
5.1
FILM
How to Plan an Orgy in a Small Town2015

Series

13 Titles
The Kelly Clarkson Show
6.4
SERIES
The Kelly Clarkson Show2019–
Hannibal
8.3
SERIES
Hannibal2013–
Warehouse 13
7.7
SERIES
Warehouse 132009–
Halt and Catch Fire
7.9
SERIES
Halt and Catch Fire2014–
Republic of Doyle
7.0
SERIES
Republic of Doyle2010–
Killjoys
6.9
SERIES
Killjoys2015–
Perry Mason
7.2
SERIES
Perry Mason2020–
Your Honor
8.1
SERIES
Your Honor2020–
City on a Hill
7.3
SERIES
City on a Hill2019–
The Copenhagen Test
6.4
SERIES
The Copenhagen Test2025–
61st Street
6.9
SERIES
61st Street2022–
The Last Tycoon
7.0
SERIES
The Last Tycoon2017–
The Sticky
7.2
SERIES
The Sticky2024–
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