Mark O'Brien
Acting Born May 7, 1984 St. Johns, Newfoundland, Canada 24 credits
Biography
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).
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Full filmography
- The Kelly Clarkson Show (2019) as Self
- Hannibal (2013) as Randall Tier
- Republic of Doyle (2010) as Des Courtney
- Warehouse 13 (2009) as Jerry Hoffler
- Arrival (2016) as Captain Marks
- Halt and Catch Fire (2014) as Tom Rendon
- Perry Mason (2020) as Thomas Milligan
- Ready or Not (2019) as Alex
- Nuremberg (2025) as Colonel John Amen
- Your Honor (2020) as Father Jay
- Killjoys (2015) as Grayson Hicks
- The Copenhagen Test (2025) as Edmund Cobb
- City on a Hill (2019) as Jimmy Ryan
- The Voices of Our Mother (2026) as William
- Marriage Story (2019) as Carter Mitchum
- The Darkest Minds (2018) as Rob Meadows
- The Last Tycoon (2017) as Max Miner
- Bad Times at the El Royale (2018) as Larsen Rogers
- 61st Street (2022) as Officer Logan
- The Sticky (2024) as Charlie
- Kin (2018) as Jake
- How It Ends (2018) as Jeremiah
- Anon (2018) as Cyrus Frear
- The Front Runner (2018) as Billy Shore