Mark O'Brien

Acting · Born 1984-05-07 · St. Johns, Newfoundland, Canada

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).

Known for

• The Voices of Our Mother (2026)
• The Outer Threat (2026)
• Seven Veils (2025)
• Shadow of God (2025)
• Nuremberg (2025)
• The Memory Keeper (2025)
• Topper (2025)
• Blue Bayou (2021)
• The Righteous (2021)
• State Like Sleep (2019)
• Marriage Story (2019)
• Goalie (2019)
• Hammer (2019)
• Ready or Not (2019)
• Anon (2018)
• Kin (2018)
• Parallel (2018)
• The Darkest Minds (2018)
• Bad Times at the El Royale (2018)
• The Front Runner (2018)
• How It Ends (2018)
• The Dark Stranger (2016)
• Arrival (2016)
• Wanderer (2016)