Mark O'Brien

Explore Mark O'Brien’s films. Browse credits and ratings, see where to watch, and find your next movie with ReelBot.

Acting

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

• The Outer Threat (2026)
• The Voices of Our Mother (2026)
• Nuremberg (2025)
• The Memory Keeper (2025)
• Shadow of God (2025)
• Seven Veils (2025)
• Topper (2025)
• Blue Bayou (2021)
• The Righteous (2021)
• Hammer (2019)
• Marriage Story (2019)
• Ready or Not (2019)
• Goalie (2019)
• State Like Sleep (2019)
• The Front Runner (2018)
• Bad Times at the El Royale (2018)
• Kin (2018)
• The Darkest Minds (2018)
• How It Ends (2018)
• Anon (2018)
• Parallel (2018)
• Arrival (2016)
• Wanderer (2016)
• The Dark Stranger (2016)
• How to Plan an Orgy in a Small Town (2015)
• End of Days, Inc. (2015)
• Dennis (2015)
• Sweetieface (2013)
• Beat Down (2012)
• Kathy (2011)
• Snarbuckled (2010)
• Brad (2010)
• Grown Up Movie Star (2010)
• Mum's the Word (2009)
• Quiet at Dawn (2009)
• Cut from the Same Cloth (2009)
• Heartless Disappearance Into Labrador Seas (2008)
• Epilogue (2008)
• Pretty Girls (2008)
• The One That Got Away (2008)
• The Four Horsemen (2008)
• Little One
• Soma
• Good in the Room
• Better People
• Nice People