Acting
Mark O'Brien
Birth Date
May 7, 1984
(42 years old)
Place of Birth
St. Johns, Newfoundland, Canada
Popularity
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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).
Photos
star6.3
TV Show
The Kelly Clarkson Show
Self
2019 • 1 episode
star8.3
TV Show
Hannibal
Randall Tier
2013 • 2 episodes
star7.7
TV Show
Warehouse 13
Jerry Hoffler
2009 • 1 episode
star4.0
Movie
The Outer Threat
2026
star7.0
TV Show
Republic of Doyle
Des Courtney
2010 • 77 episodes
star7.6
Movie
Arrival
Captain Marks
2016
star7.1
Movie
Ready or Not
Alex
2019
star7.6
Movie
Nuremberg
Colonel John Amen
2025
star7.2
TV Show
Perry Mason
Thomas Milligan
2020 • 7 episodes
star7.9
TV Show
Halt and Catch Fire
Tom Rendon
2014 • 15 episodes
star6.9
TV Show
Killjoys
Grayson Hicks
2015 • 1 episode
star8.1
TV Show
Your Honor
Father Jay
2020 • 3 episodes
star7.2
TV Show
City on a Hill
Jimmy Ryan
2019 • 14 episodes
star6.5
TV Show
The Copenhagen Test
Edmund Cobb
2025 • 8 episodes
star7.7
Movie
Marriage Story
Carter Mitchum
2019
star6.9
TV Show
61st Street
Officer Logan
2022 • 8 episodes
star7.0
Movie
The Darkest Minds
Rob Meadows
2018
star7.0
TV Show
The Last Tycoon
Max Miner
2017 • 9 episodes
star6.8
Movie
Bad Times at the El Royale
Larsen Rogers
2018
star7.2
TV Show
The Sticky
Charlie
2024 • 1 episode