Mark O'Brien

Personal Info

Know For

Acting

Gender

Male

Birthday

1984-05-07 (41 years old)

Place of Birth

St. Johns, Newfoundland, Canada

Mark O'Brien

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

2025

2008

The Four Horsemen

as Eric Rollins

2009

Cut from the Same Cloth

as Jack Cochrane

2025

Shadow of God

as Mason Harper

2010

Snarbuckled

as Jacob O'Higgins

2025

Nuremberg

as Col. John Amen

2015

2012

Beat Down

as Michael

2016

Arrival

as Captain Marks

2018

Anon

as Cyrus Frear

2019

2018

Kin

as Jake

2018

Parallel

as Josh

2018

The Darkest Minds

as Rob Meadows

2018

2019

Marriage Story

as Carter Mitchum

2018

The Front Runner

as Billy Shore

2018

How It Ends

as Jeremiah

2019

Goalie

as Terry Sawchuk

2019

Hammer

as Chris Davis

2019

Ready or Not

as Alex Le Domas

2021

2021

The Righteous

as Aaron Smith

2009

2008

Epilogue

as Henry

2010

Brad

as Brad

2015

Dennis

as Dennis

-

Falsehood

as Elizeus Carrier

2009

2025

Topper

as Topper

2008

The One That Got Away

as Tommy Palchek

2013

2016

Wanderer

as Eric

Production

2021

The Righteous

as Executive Producer

2021

The Righteous

as Director

2021

The Righteous

as Writer

2016

Wanderer

as Director

2019

Goalie

as Executive Producer

2011

Kathy

as Director

2010

Brad

as Producer

2010

Brad

as Editor

2015

Dennis

as Producer

-

Better People

as Director

-

Better People

as Writer

-

Better People

as Editor

2013

Sweetieface

as Director

2013

Sweetieface

as Producer

2013

Sweetieface

as Editor

2016

Wanderer

as Producer

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