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Mark O'Brien

Mark O'Brien

Birthday: 1984-05-07 | Place of Birth: Canada

Mark O'Brien (born May 7, 1984) is a Canadian actor and director. He is best known for playing the role of Des Courtney in Republic of Doyle and Tom Rendon in Halt and Catch Fire.

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Known For

Acting

Year
Title

Role

2021
The Righteous

as    Aaron Smith

2021
Blue Bayou

as    Ace

2019
Ready or Not

as    Alex Le Domas

2019
State Like Sleep

as    Darren

2018
The Front Runner

as    Billy Shore

2018
Anon

as    Cyrus Frear

2018
How It Ends

as    Jeremiah

2018
Parallel

as    Josh

2018
The Darkest Minds

as    Rob Meadows

2017
The Last Tycoon

as    Max Miner

2016
2016
Arrival

as    Captain Marks

2016
The Dark Stranger

as    Mark

2015
End of Days, Inc.

as    Jason

2010
Republic of Doyle

as    Des Courtney

2008
The Four Horsemen

as    Eric Rollins