Acting

Mark O'Brien

Born 1984-05-07 · 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).

Credits

Newest first

The Outer Threat
as Daniel Ashford
2026
The Voices of Our Mother
as William
2026
The Voices of Our Mother
Director
2026
The Voices of Our Mother
Writer
2026
The Copenhagen Test
as Edmund Cobb
2025
Nuremberg
as Colonel John Amen
2025
The Memory Keeper
as Elizeus Carrier
2025
Shadow of God
as Mason Harper
2025
Seven Veils
as Paul
2025
Topper
as Topper
2025
The Sticky
as Charlie
2024
61st Street
as Officer Logan
2022
Blue Bayou
as Ace
2021
The Righteous
as Aaron Smith
2021
The Righteous
Director
2021
The Righteous
Writer
2021
The Righteous
Executive Producer
2021
Your Honor
as Father Jay
2020
Perry Mason
as Thomas Milligan
2020
Hammer
as Chris Davis
2019
Marriage Story
as Carter Mitchum
2019
The Kelly Clarkson Show
as Self
2019
Ready or Not
as Alex
2019
City on a Hill
as Jimmy Ryan
2019
Goalie
as Terry Sawchuk
2019
Goalie
Executive Producer
2019
State Like Sleep
as Darren
2019
The Front Runner
as Billy Shore
2018
Bad Times at the El Royale
as Larsen Rogers
2018
Kin
as Jake
2018
The Darkest Minds
as Rob Meadows
2018
How It Ends
as Jeremiah
2018
Anon
as Cyrus Frear
2018
Parallel
as Josh
2018
The Last Tycoon
as Max Miner
2017
Arrival
as Captain Marks
2016
Wanderer
as Eric
2016
Wanderer
Director
2016
Wanderer
Producer
2016
The Dark Stranger
as Mark
2016
How to Plan an Orgy in a Small Town
as Bruce Buck
2015
Killjoys
as Grayson Hicks
2015
End of Days, Inc.
as Jason
2015
Dennis
as Dennis
2015
Dennis
Producer
2015
Halt and Catch Fire
as Tom Rendon
2014
Hannibal
as Randall Tier
2013
Sweetieface
as Sam
2013
Sweetieface
Director
2013
Sweetieface
Producer
2013
Sweetieface
Editor
2013
Beat Down
as Michael
2012
Kathy
Director
2011
Snarbuckled
as Jacob O'Higgins
2010
Brad
as Brad
2010
Brad
Producer
2010
Brad
Editor
2010
Grown Up Movie Star
as Will
2010
Republic of Doyle
as Des Courtney
2010
Mum's the Word
as Curtis
2009
Quiet at Dawn
as Watts
2009
Warehouse 13
as Jerry Hoffler
2009
Cut from the Same Cloth
as Jack Cochrane
2009
Heartless Disappearance Into Labrador Seas
as Charlie
2008
Epilogue
as Henry
2008
Pretty Girls
Director
2008
Pretty Girls
Writer
2008
Pretty Girls
Editor
2008
Pretty Girls
Cinematography
2008
The One That Got Away
as Tommy Palchek
2008
The Four Horsemen
as Eric Rollins
2008
Better People
as John
—
Nice People
—
Good in the Room
as Charlie
—
Little One
—
Soma
as Paul
—
Stillwater
as Deputy Ted Keegan
—
Better People
Director
—
Better People
Writer
—
Better People
Editor
—