
Mark O'Brien
41 years
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).
Acting (31 movies)

Seven Veils
2025

The Four Horsemen
2008

Grown Up Movie Star
2009

Heartless Disappearance Into Labrador Seas
2008

Shadow of God
2025

Snarbuckled
2010

The Dark Stranger
2016

Nuremberg
2025

End of Days, Inc.
2015

Beat Down
2012

Arrival
2016

Anon
2018

State Like Sleep
2019

Kin
2018

Parallel
2018

The Darkest Minds
2018

How to Plan an Orgy in a Small Town
2015

Bad Times at the El Royale
2018

Marriage Story
2019

The Front Runner
2018

How It Ends
2018

Goalie
2019

Hammer
2019

Ready or Not
2019

Blue Bayou
2021

The Righteous
2021

Dennis
2015

Falsehood
2025

Topper
2025

The One That Got Away
2008

Wanderer
2016
Directing (5 movies)
| Title | Year | Job |
|---|---|---|
| Pretty Girls | 2008 | Writer |
| Brad | 2010 | Producer |
| Sweetieface | 2013 | Producer |
| Dennis | 2015 | Producer |
| Wanderer | 2016 | Producer |
| Goalie | 2019 | Executive Producer |
| The Righteous | 2021 | Executive Producer |
| The Righteous | 2021 | Writer |
