Mark O'Brien

Actor

Born: May 7, 1984 (age 42)
From: 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).

Filmography (45)

The Outer Threat (2026)
The Voices of Our Mother (2026)
Director
Nuremberg (2025)
Colonel John Amen
The Memory Keeper (2025)
Elizeus Carrier
Shadow of God (2025)
Mason Harper
Seven Veils (2025)
Paul
Topper (2025)
Topper
Blue Bayou (2021)
Ace
The Righteous (2021)
Director
Hammer (2019)
Chris Davis
Marriage Story (2019)
Carter Mitchum
Ready or Not (2019)
Alex
Goalie (2019)
Terry Sawchuk
State Like Sleep (2019)
Darren
The Front Runner (2018)
Billy Shore
Bad Times at the El Royale (2018)
Larsen Rogers
Kin (2018)
Jake
The Darkest Minds (2018)
Rob Meadows
How It Ends (2018)
Jeremiah
Anon (2018)
Cyrus Frear
Parallel (2018)
Josh
Arrival (2016)
Captain Marks
Wanderer (2016)
Director
The Dark Stranger (2016)
Mark
How to Plan an Orgy in a Small Town (2015)
Bruce Buck
End of Days, Inc. (2015)
Jason
Dennis (2015)
Dennis
Sweetieface
Sweetieface (2013)
Director
Beat Down (2012)
Michael
Kathy (2011)
Director