Mark O'Brien
🎭 Actor

Mark O'Brien

🎂 Born 7 May 1984 (age 42)📍 St. Johns, Newfoundland, Canada
1
Popularity Score
33
Acting Credits
4
Directed

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

Arrival
★ 7.6
Arrival
2016
Captain Marks
Ready or Not
★ 7.1
Ready or Not
2019
Alex
Nuremberg
★ 7.6
Nuremberg
2025
Colonel John Amen
The Darkest Minds
★ 7.0
The Darkest Minds
2018
Rob Meadows

Directed Films(4)

The Voices of Our Mother
★ 6.6
The Voices of Our Mother
2026
Director
The Righteous
★ 6.3
The Righteous
2021
Director
Wanderer
Wanderer
2016
Director
Kathy
Kathy
2011
Director

Full Filmography(33 films)

YearTitleRating
2016Arrival★ 7.62019Ready or Not★ 7.12025Nuremberg★ 7.62018The Darkest Minds★ 7.02019Marriage Story★ 7.72018Bad Times at the El Royale★ 6.82026The Voices of Our Mother★ 6.62018Anon★ 6.02018How It Ends★ 5.32018Kin★ 6.12018The Front Runner★ 5.92018Parallel★ 6.02025Seven Veils★ 5.62021Blue Bayou★ 7.42025Shadow of God★ 5.72015How to Plan an Orgy in a Small Town★ 5.12026The Outer Threat—2021The Righteous★ 6.32008The Four Horsemen★ 3.82019Hammer★ 5.42012Beat Down—2019State Like Sleep★ 4.72019Goalie★ 6.92025The Memory Keeper—2008The One That Got Away★ 4.32025Topper★ 5.32016The Dark Stranger★ 4.92015Dennis—2010Grown Up Movie Star★ 5.12008Heartless Disappearance Into Labrador Seas—2015End of Days, Inc.★ 5.72016Wanderer—2010Snarbuckled—
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