Mark O'Brien
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 07, 1984
St. Johns, Newfoundland, Canada
Known For
Acting
Movies
44 acting
25 crew
Popularity
1.7
Known For
Arrival
2016
as Captain Marks
Ready or Not
2019
as Alex
Nuremberg
2025
as Colonel John Amen
Marriage Story
2019
as Carter Mitchum
Bad Times at the El Royale
2018
as Larsen Rogers
The Darkest Minds
2018
as Rob Meadows
How It Ends
2018
as Jeremiah
The Front Runner
2018
as Billy Shore
Anon
2018
as Cyrus Frear
Blue Bayou
2021
as Ace
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