Mark O'Brien

Mark O'Brien

Acting
Born 1984-05-07 St. Johns, Newfoundland, Canada

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).

Movies (44)

Arrival
7.6

Arrival

2016Movie7.6
Nuremberg
7.6

Nuremberg

2025Movie7.6
Ready or Not
7.1

Ready or Not

2019Movie7.1
Bad Times at the El Royale
6.8

Bad Times at the El Royale

2018Movie6.8
Marriage Story
7.7

Marriage Story

2019Movie7.7
How It Ends
5.3

How It Ends

2018Movie5.3
The Outer Threat
5.8

The Outer Threat

2026Movie5.8
Shadow of God
5.7

Shadow of God

2025Movie5.7
The Darkest Minds
7.0

The Darkest Minds

2018Movie7.0
Parallel
6.0

Parallel

2018Movie6.0
Anon
6.0

Anon

2018Movie6.0
Kin
6.1

Kin

2018Movie6.1
The Front Runner
5.9

The Front Runner

2018Movie5.9
Blue Bayou
7.4

Blue Bayou

2021Movie7.4
Seven Veils
5.6

Seven Veils

2025Movie5.6
Beat Down

Beat Down

2012Movie
How to Plan an Orgy in a Small Town
5.1

How to Plan an Orgy in a Small Town

2015Movie5.1
The Memory Keeper

The Memory Keeper

2025Movie
Little One

Little One

Movie
State Like Sleep
4.7

State Like Sleep

2019Movie4.7
Brad

Brad

2010Movie
The Dark Stranger
4.9

The Dark Stranger

2016Movie4.9
The Voices of Our Mother
6.4

The Voices of Our Mother

2026Movie6.4
The Righteous
6.3

The Righteous

2021Movie6.3
Epilogue

Epilogue

2008Movie
Nice People

Nice People

Movie
Wanderer
5.0

Wanderer

2016Movie5.0
Hammer
5.4

Hammer

2019Movie5.4
Heartless Disappearance Into Labrador Seas

Heartless Disappearance Into Labrador Seas

2008Movie
Dennis

Dennis

2015Movie
Better People

Better People

Movie
The Four Horsemen
5.9

The Four Horsemen

2008Movie5.9
Good in the Room

Good in the Room

Movie
Goalie
6.8

Goalie

2019Movie6.8
End of Days, Inc.
5.8

End of Days, Inc.

2015Movie5.8
Topper
5.3

Topper

2025Movie5.3
Quiet at Dawn

Quiet at Dawn

2009Movie
The One That Got Away
4.3

The One That Got Away

2008Movie4.3
Grown Up Movie Star
5.1

Grown Up Movie Star

2010Movie5.1
Sweetieface

Sweetieface

2013Movie
Mum's the Word

Mum's the Word

2009Movie
Soma

Soma

Movie
Snarbuckled

Snarbuckled

2010Movie
Cut from the Same Cloth

Cut from the Same Cloth

2009Movie

TV Shows (13)

The Kelly Clarkson Show
6.3

The Kelly Clarkson Show

2019Series6.3
Hannibal
8.3

Hannibal

2013Series8.3
Warehouse 13
7.7

Warehouse 13

2009Series7.7
Halt and Catch Fire
7.9

Halt and Catch Fire

2014Series7.9
Perry Mason
7.2

Perry Mason

2020Series7.2
Republic of Doyle
7.0

Republic of Doyle

2010Series7.0
Your Honor
8.1

Your Honor

2020Series8.1
City on a Hill
7.3

City on a Hill

2019Series7.3
Killjoys
6.9

Killjoys

2015Series6.9
The Copenhagen Test
6.6

The Copenhagen Test

2025Series6.6
61st Street
6.2

61st Street

2022Series6.2
The Sticky
7.2

The Sticky

2024Series7.2
The Last Tycoon
7.0

The Last Tycoon

2017Series7.0