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Mark O'Brien

Mark O'Brien

Known for: Acting

Born 07/05/1984
Place of birth 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).

Filmography

The Kelly Clarkson Show Series ★ 6,4

The Kelly Clarkson Show

Self

2019
Hannibal Series ★ 8,3

Hannibal

Randall Tier

2013
Warehouse 13 Series ★ 7,7

Warehouse 13

Jerry Hoffler

2009
Nuremberg Film ★ 7,5

Nuremberg

Colonel John Amen

2025
Ready or Not Film ★ 7,1

Ready or Not

Alex

2019
Republic of Doyle Series ★ 7,0

Republic of Doyle

Des Courtney

2010
Arrival Film ★ 7,6

Arrival

Captain Marks

2016
Halt and Catch Fire Series ★ 7,9

Halt and Catch Fire

Tom Rendon

2014
Perry Mason Series ★ 7,2

Perry Mason

Thomas Milligan

2020
Killjoys Series ★ 6,9

Killjoys

Grayson Hicks

2015
Your Honor Series ★ 8,1

Your Honor

Father Jay

2020
City on a Hill Series ★ 7,3

City on a Hill

Jimmy Ryan

2019
The Copenhagen Test Series ★ 6,5

The Copenhagen Test

Edmund Cobb

2025
Marriage Story Film ★ 7,7

Marriage Story

Carter Mitchum

2019
Bad Times at the El Royale Film ★ 6,8

Bad Times at the El Royale

Larsen Rogers

2018
The Last Tycoon Series ★ 7,0

The Last Tycoon

Max Miner

2017
61st Street Series ★ 6,9

61st Street

Officer Logan

2022
The Darkest Minds Film ★ 7,0

The Darkest Minds

Rob Meadows

2018
The Sticky Series ★ 7,2

The Sticky

Charlie

2024
How It Ends Film ★ 5,3

How It Ends

Jeremiah

2018
Anon Film ★ 6,0

Anon

Cyrus Frear

2018
The Front Runner Film ★ 5,9

The Front Runner

Billy Shore

2018
Seven Veils Film ★ 5,6

Seven Veils

Paul

2025
Kin Film ★ 6,1

Kin

Jake

2018
Goalie Film ★ 6,9

Goalie

Terry Sawchuk

2019
Parallel Film ★ 6,0

Parallel

Josh

2018
Blue Bayou Film ★ 7,4

Blue Bayou

Ace

2021
How to Plan an Orgy in a Small Town Film ★ 5,1

How to Plan an Orgy in a Small Town

Bruce Buck

2015
Shadow of God Film ★ 5,7

Shadow of God

Mason Harper

2025
The Memory Keeper Film

The Memory Keeper

Elizeus Carrier

2025
State Like Sleep Film ★ 4,7

State Like Sleep

Darren

2019
The Four Horsemen Film ★ 3,8

The Four Horsemen

Eric Rollins

2008
Hammer Film ★ 5,4

Hammer

Chris Davis

2019
Grown Up Movie Star Film ★ 5,1

Grown Up Movie Star

Will

2010
Beat Down Film

Beat Down

Michael

2012
Topper Film ★ 5,3

Topper

Topper

2025
The One That Got Away Film ★ 4,3

The One That Got Away

Tommy Palchek

2008
The Voices of Our Mother Film

The Voices of Our Mother

William

2026
The Righteous Film ★ 6,2

The Righteous

Aaron Smith

2021
End of Days, Inc. Film ★ 5,7

End of Days, Inc.

Jason

2015
Wanderer Film

Wanderer

Eric

2016
Heartless Disappearance Into Labrador Seas Film

Heartless Disappearance Into Labrador Seas

Charlie

2008
The Dark Stranger Film ★ 4,9

The Dark Stranger

Mark

2016
Film

Quiet at Dawn

Watts

2009
Film

Nice People
Film

The Outer Threat
Snarbuckled Film

Snarbuckled

Jacob O'Higgins

2010
Film

Cut from the Same Cloth

Jack Cochrane

2009
Dennis Film

Dennis

Dennis

2015
Film

Good in the Room

Charlie
Film

Brad

Brad

2010
Film

Epilogue

Henry

2008
Film

Better People

John
Film

Mum's the Word

Curtis

2009
Film

Sweetieface

Sam

2013