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Mark O'Brien

Mark O'Brien

Actor, Director, Writer

Born May 7, 1984 in St. Johns, Newfoundland, Canada

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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).

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10 wins and 7 nominations

Mark O'Brien Photos

Mark O'Brien Videos

The Outer Threat | Official Trailer

THE OUTER THREAT Official Trailer (2026)

THE VOICES OF OUR MOTHER Official Trailer (2026)

The Voices Of Our Mother - Official Trailer (2026)

Shadow of God - Official Trailer (2025) Mark O'Brien, Jacqueline Byers, Shaun Johnston

SHADOW OF GOD Official Trailer (2025)

SHADOW OF GOD Trailer (2025) Horror Movie [HD]

Shadow of God | Official Trailer | Shudder

Interview with Atom Egoyan and Amanda Seyfried

Official Trailer

Berlinale Press Conference "Seven Veils"

TIFF 2023 Q&A with Atom Egoyan

Official UK Trailer

The Righteous Clip - Dinner Time

The Righteous Clip - A stranger calls

The Righteous Clip - Pray

The Righteous Trailer

The Righteous - Official Trailer (2022) Mark O'Brien, Henry Czerny, Mimi Kuzyk

BLUE BAYOU - "He's American" Clip - Only in Theaters September 17

BLUE BAYOU - "Where You From" Clip - Only in Theaters September 17

Blue Bayou | Alicia Vikander Sings at a Dinner Party

"You Chose Me Just Like I Chose You"

Trying to Provide For His Family Extended Preview

Kathy Leaves Antonio Because She Doesn’t Know Him

BLUE BAYOU - Official Trailer - Only in Theaters September 17

BLUE BAYOU - "Fleur De Lis" Clip - Only in Theaters September 17

BLUE BAYOU - "Story" Featurette - Only in Theaters September 17

Reel Destinations | Blue Bayou | New Orleans | Ep. 9

BLUE BAYOU - "You Think I Care About The Money" Clip - Only In Theaters September 17

Blue Bayou | Antonio's Family (Alicia Vikander & Justin Chon) | Extended Preview

Dress For Success

Red Band Trailer

"Hide and Seek" Film Clip

Don't Want to Kill Me

Look For It on Digital, Blu-ray & DVD

DIY Wedding Dress

Storytime with Samara

GOALIE Exclusive Interview [HD] Mongrel Media

Goalie - Official Trailer

GOALIE Trailer [HD] Mongrel Media

Official US Trailer

Featurette on Will Patton

Official Canadian Trailer

END OF DAYS, INC. Feature Film Trailer

Better People trailer

Filmography

Actor

74

Type

Year

F.A.S.T. Poster

F.A.S.T. Feature Film2027Mark Allred

The Outer Threat Poster

The Outer Threat Feature Film2026Daniel Ashford

The Voices of Our Mother Poster

The Voices of Our Mother Feature Film2026William

Trinity TV Series2026Dr. Brian York

Falsehood Poster

Falsehood Feature Film2025Elizeus Carrier

Nuremberg Poster

Nuremberg Feature Film2025Colonel John Amen

Shadow of God Poster

Shadow of God Feature Film2025Mason Harper

The Copenhagen Test Poster

The Copenhagen Test TV Series2025Edmund Cobb

Topper Feature Film2025Topper

The Sticky Poster

The Sticky TV Series2024Charlie

Canadian Screen Awards Poster

Canadian Screen Awards TV Special2023Self - Actor & Director

Canadian Screen Awards with Samantha Bee TV Special2023Self

Seven Veils Poster

Seven Veils Feature Film2023

61st Street Poster

61st Street TV Series2022Johnny Logan

Blue Bayou Poster

Blue Bayou Feature Film2021Ace

The Righteous Poster

The Righteous Feature Film2021Aaron Smith

Perry Mason Poster

Perry Mason TV Series2020Thomas Milligan

Your Honor Poster

Your Honor TV Series2020Father Jay

City on a Hill Poster

City on a Hill TV Series2019Jimmy Ryan

Goalie Feature Film2019Terry Sawchuk

Hammer Feature Film2019Chris Davis

Marriage Story Poster

Marriage Story Feature Film2019Carter Mitchum

Ready or Not Poster

Ready or Not Feature Film2019Alex

The Kelly Clarkson Show Poster

The Kelly Clarkson Show TV Series2019Self - Guest

Anon Feature Film2018Cyrus Frear

Bad Times at the El Royale Poster

Bad Times at the El Royale Feature Film2018Larsen Rogers

How It Ends Poster

How It Ends Feature Film2018Jeremiah

Parallel Poster

Parallel Feature Film2018Josh

The Darkest Minds Poster

The Darkest Minds Feature Film2018Rob

The Front Runner Poster

The Front Runner Feature Film2018Billy Shore

Steve Varley Show TV Series2017Self

Arrival Feature Film2016Captain Marks

The Last Tycoon Poster

The Last Tycoon TV Series2016Max Miner

Dennis Short Film2015Dennis

End of Days, Inc. Poster

End of Days, Inc. Feature Film2015Jason

How to Plan an Orgy in a Small Town Poster

How to Plan an Orgy in a Small Town Feature Film2015Bruce Buck

Killjoys Poster

Killjoys TV Series2015Grayson Hicks

Len and Company Poster

Len and Company Feature Film2015Zach

The Dark Stranger Poster

The Dark Stranger Feature Film2015Mark

Wanderer Poster

Wanderer Short Film2015Eric

Whitehorse Poster

Whitehorse Short Film2015Evan

Halt and Catch Fire Poster

Halt and Catch Fire TV Series2014Tom Rendon

Celebrity Page Poster

Celebrity Page TV Series2013Self

Hannibal Poster

Hannibal TV Series2013Randall Tier

Sweetieface Short Film2013

The Youth Code: Life Beyond Surviving TV Movie2013Self

Beat Down Poster

Beat Down Feature Film2012Michael

Better People Poster

Better People Short Film2012John

Diary of a Deadly P.I. TV Series2012Des Courtney

Saving Hope Poster

Saving Hope TV Series2012Marshall Parker

Katie Chats Poster

Katie Chats TV Series2011Self

The 12th Annual Canadian Comedy Awards Poster

The 12th Annual Canadian Comedy Awards TV Special2011Self - Presenter

Brad Short Film2010Brad

Republic of Doyle Poster

Republic of Doyle TV Series2010Des Courtney

Snarbuckled Poster

Snarbuckled Short Film2010Jacob O'Higgins

Cut from the Same Cloth Short Film2009Jack Cochrane

Grown Up Movie Star Poster

Grown Up Movie Star Feature Film2009Will

Kevin Pollak's Chat Show Poster

Kevin Pollak's Chat Show TV Series2009Self

Mum's the Word Short Film2009Curtis

Quiet at Dawn Poster

Quiet at Dawn Short Film2009Watts

Warehouse 13 Poster

Warehouse 13 TV Series2009Jerry Hoffler

Epilogue Short Film2008Henry

Heartless Disappearance Into Labrador Seas Poster

Heartless Disappearance Into Labrador Seas Short Film2008Charlie

InnerSpace Poster

InnerSpace TV Series2008Self - Interviewee

Murdoch Mysteries Poster

Murdoch Mysteries TV Series2008Jerome Bradley

Patiently Wasting Short Film2008Paul

The Four Horsemen Poster

The Four Horsemen Video2008Eric Rollins

The One That Got Away Poster

The One That Got Away TV Movie2008Tommy Palchek

Above and Beyond Poster

Above and Beyond Mini-Series2006Drake

You're It! TV Series2006Mark

Downward Calling Short Film2005John Doe

Legends and Lore of the North Atlantic TV Series2005

Hollywood on Set Poster

Hollywood on Set TV Series2003Self

This Hour Has 22 Minutes Poster

This Hour Has 22 Minutes TV Series1993Des Courtney

Director

14

Type

Year

The Voices of Our Mother Poster

The Voices of Our Mother Feature Film2026

The Righteous Poster

The Righteous Feature Film2021

Threshold Poster

Threshold Short Film2018

Reel East Coast Poster

Reel East Coast TV Series2015

Wanderer Poster

Wanderer Short Film2015

Who Is Hannah? Poster

Who Is Hannah? Short Film2015

Sweetieface Short Film2013

Better People Poster

Better People Short Film2012

Diary of a Deadly P.I. TV Series2012

Kathy Short Film2011

Republic of Doyle Poster

Republic of Doyle TV Series2010

Pretty Girls Short Film2008

Lying Awake Short Film2006

Downward Calling Short Film2005

Writer

7

Type

Year

The Voices of Our Mother Poster

The Voices of Our Mother Feature Film2026

The Righteous Poster

The Righteous Feature Film2021

Threshold Poster

Threshold Short Film2018

Better People Poster

Better People Short Film2012

Diary of a Deadly P.I. TV Series2012

Lying Awake Short Film2006

Downward Calling Short Film2005

Producer

10

Type

Year

Shadow of God Poster

Shadow of God Feature Film2025

Topper Feature Film2025

The Righteous Poster

The Righteous Feature Film2021

Goalie Feature Film2019

Dennis Short Film2015

Wanderer Poster

Wanderer Short Film2015

Sweetieface Short Film2013

Brad Short Film2010

Lying Awake Short Film2006

Downward Calling Short Film2005

Editor

6

Sweetieface Short Film2013

Better People Poster

Better People Short Film2012

Brad Short Film2010

Pretty Girls Short Film2008

Lying Awake Short Film2006

Downward Calling Short Film2005

2nd Unit / Asst Director

1

Republic of Doyle Poster

Republic of Doyle TV Series2010

Cinematographer

2

Pretty Girls Short Film2008

Lying Awake Short Film2006

Thanks

2

Aliens on Halloween Poster

Aliens on Halloween Short Film2021

Life Doesn't Frighten Me Poster

Life Doesn't Frighten Me Short Film2012

Composer

1

Lying Awake Short Film2006

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