Mark O'Brien
Acting
May 7, 1984 (41) St. Johns, Newfoundland, Canada
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).
Known for
2025Seven Veils
Paul
2025Shadow of God
Mason Harper
2025Nuremberg
Colonel John Amen
2025Falsehood
Elizeus Carrier
2025Topper
Topper
2021Blue Bayou
Ace
2021The Righteous
Aaron Smith
2019State Like Sleep
Darren
2019Marriage Story
Carter Mitchum
2019Goalie
Terry Sawchuk
2019Hammer
Chris Davis
2019Ready or Not
Alex Le Domas
2018Anon
Cyrus Frear
2018Kin
Jake
2018Parallel
Josh
2018The Darkest Minds
Rob Meadows
2018Bad Times at the El Royale
Larsen Rogers
2018The Front Runner
Billy Shore
2018How It Ends
Jeremiah
2016The Dark Stranger
Mark
2016Arrival
Captain Marks
2016Wanderer
Eric
2015End of Days, Inc.
Jason
2015How to Plan an Orgy in a Small Town
Bruce Buck
