May 7, 1984 - 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).
Media | ||||
|---|---|---|---|---|
| Movie | 2024 | Seven Veils | Paul | |
| Movie | 2008 | The Four Horsemen | Eric Rollins | |
| Movie | 2009 | Grown Up Movie Star | Will | |
| Movie | 2009 | Cut from the Same Cloth | Jack Cochrane | |
| Movie | 2008 | Heartless Disappearance Into Labrador Seas | Charlie | |
| Movie | 2025 | Shadow of God | Mason Harper | |
| Movie | 2010 | Snarbuckled | Jacob O'Higgins | |
| Movie | 2016 | The Dark Stranger | Mark | |
| Movie | 2025 | Nuremberg | Colonel John Amen | |
| Movie | 2015 | End of Days, Inc. | Jason | |
| Movie | N/A | The Voices of Our Mother | William | |
| Movie | 2012 | Beat Down | Michael | |
| Movie | 2016 | Arrival | Captain Marks | |
| Movie | 2018 | Anon | Cyrus Frear | |
| Movie | 2019 | State Like Sleep | Darren | |
| Movie | 2018 | Kin | Jake | |
| Movie | 2018 | Parallel | Josh | |
| Movie | 2018 | The Darkest Minds | Rob Meadows | |
| Movie | 2015 | How to Plan an Orgy in a Small Town | Bruce Buck | |
| Movie | 2018 | Bad Times at the El Royale | Larsen Rogers | |
| Movie | 2019 | Marriage Story | Carter Mitchum | |
| Movie | 2018 | The Front Runner | Billy Shore | |
| Movie | 2018 | How It Ends | Jeremiah | |
| Movie | 2019 | Goalie | Terry Sawchuk | |
| Movie | 2019 | Hammer | Chris Davis | |
| Movie | 2019 | Ready or Not | Alex Le Domas | |
| Movie | 2021 | Blue Bayou | Ace | |
| Movie | 2021 | The Righteous | Aaron Smith | |
| Movie | 2009 | Mum's the Word | Curtis | |
| Movie | 2008 | Epilogue | Henry | |
| Movie | 2010 | Brad | Brad | |
| Movie | N/A | The Embers and the Stars | ||
| Movie | 2015 | Dennis | Dennis | |
| Movie | N/A | Falsehood | Elizeus Carrier | |
| Movie | 2009 | Quiet at Dawn | Watts | |
| Movie | 2025 | Topper | Topper | |
| Movie | 2008 | The One That Got Away | Tommy Palchek | |
| Movie | N/A | Better People | John | |
| Movie | 2013 | Sweetieface | Sam | |
| Movie | 2016 | Wanderer | Eric | |
| TV Show | 2020 | Perry Mason | Thomas Milligan | 7 |
| TV Show | 2010 | Republic of Doyle | Des Courtney | 77 |
| TV Show | 2017 | The Last Tycoon | Max Miner | 9 |
| TV Show | 2022 | 61st Street | Officer Logan | 8 |
| TV Show | 2015 | Killjoys | Grayson Hicks | 1 |
| TV Show | 2019 | The Kelly Clarkson Show | 1 | |
| TV Show | 2019 | City on a Hill | Jimmy Ryan | 14 |
| TV Show | 2013 | Hannibal | Randall Tier | 2 |
| TV Show | 2009 | Warehouse 13 | Jerry Hoffler | 1 |
| TV Show | 2014 | Halt and Catch Fire | Tom Rendon | 15 |
| TV Show | 2020 | Your Honor | Father Jay | 3 |
| TV Show | N/A | The Copenhagen Test | Cobb | 2 |
| TV Show | 2024 | The Sticky | Charlie | 1 |
Media | ||||
|---|---|---|---|---|
| Movie | 2021 | The Righteous | Director | Directing |
| Movie | 2021 | The Righteous | Writer | Writing |
| Movie | 2021 | The Righteous | Executive Producer | Production |
| Movie | 2016 | Wanderer | Director | Directing |
| Movie | N/A | The Voices of Our Mother | Director | Directing |
| Movie | N/A | The Voices of Our Mother | Writer | Writing |
| Movie | 2019 | Goalie | Executive Producer | Production |
| Movie | 2011 | Kathy | Director | Directing |
| Movie | 2010 | Brad | Producer | Production |
| Movie | 2010 | Brad | Editor | Editing |
| Movie | 2015 | Dennis | Producer | Production |
| Movie | N/A | Better People | Director | Directing |
| Movie | N/A | Better People | Writer | Writing |
| Movie | N/A | Better People | Editor | Editing |
| Movie | 2013 | Sweetieface | Director | Directing |
| Movie | 2013 | Sweetieface | Producer | Production |
| Movie | 2013 | Sweetieface | Editor | Editing |
| Movie | 2016 | Wanderer | Producer | Production |
| Movie | 2008 | Pretty Girls | Director | Directing |
| Movie | 2008 | Pretty Girls | Writer | Writing |
| Movie | 2008 | Pretty Girls | Editor | Editing |
| Movie | 2008 | Pretty Girls | Cinematography | Crew |
