Mark O'Brien
Mark O'Brien is credited on 22 movies and 12 TV shows, best known by TMDB votes for Arrival, Marriage Story and Ready or Not.
Born May 7, 1984 in St. Johns, Newfoundland, Canada.
Filmography · 34 titles
US streaming apps shown for the 12 best-known titles, checked October 5, 2026. Tap any title for where it streams and what it costs.
Arrival
2016 · Movie
On Peacock and Paramount+
Marriage Story
2019 · Movie
On Netflix
Ready or Not
2019 · Movie
On Netflix and fuboTV
Bad Times at the El Royale
2018 · Movie
Not on a US subscription app
Hannibal
2013 · TV show
On Netflix and Prime Video
The Darkest Minds
2018 · Movie
Not on a US subscription app
Your Honor
2020 · TV show
On Paramount+ and fuboTV
How It Ends
2018 · Movie
On Netflix
Nuremberg
2025 · Movie
On Netflix
Anon
2018 · Movie
On Netflix
Warehouse 13
2009 · TV show
Not on a US subscription app
Kin
2018 · Movie
On MovieSphere+
Halt and Catch Fire
2014 · TV show
Killjoys
2015 · TV show
Perry Mason
2020 · TV show
The Front Runner
2018 · Movie
Blue Bayou
2021 · Movie
City on a Hill
2019 · TV show
Parallel
2018 · Movie
The Copenhagen Test
2025 · TV show
The Sticky
2024 · TV show
The Last Tycoon
2017 · TV show
Shadow of God
2025 · Movie
Republic of Doyle
2010 · TV show
Seven Veils
2025 · Movie
The Four Horsemen
2008 · Movie
State Like Sleep
2019 · Movie
61st Street
2022 · TV show
The Dark Stranger
2016 · Movie
Hammer
2019 · Movie
The Righteous
2021 · Movie
End of Days, Inc.
2015 · Movie
Grown Up Movie Star
2010 · Movie
The Outer Threat
2026 · Movie
About Mark O'Brien
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).
Biography from TMDB, written by its community.