How old was Mark O'Brien in…

Mark O'Brien

Bio: 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)

Born: Mon, May 07 1984

Birthplace: St. Johns, Newfoundland, Canada

Mark O'Brien is 40 years old

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Acting Roles

Crew Roles

Movies (Acting Roles)

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Shadow of God

Mark O'Brien will be 41 in Shadow of God as 'Mason Harper'.

Movie Released: Thu, May 15 2025

Seven Veils

Mark O'Brien was 40 in Seven Veils as 'Paul'.

Movie Released: Fri, Mar 07 2025

Blue Bayou

Mark O'Brien was 37 in Blue Bayou as 'Ace'.

Movie Released: Fri, Sep 10 2021

The Righteous

Mark O'Brien was 37 in The Righteous as 'Aaron Smith'.

Movie Released: Sun, Aug 15 2021

Hammer

Mark O'Brien was 35 in Hammer as 'Chris Davis'.

Movie Released: Thu, Dec 05 2019

Marriage Story

Mark O'Brien was 35 in Marriage Story as 'Carter Mitchum'.

Movie Released: Sat, Sep 28 2019

Ready or Not

Mark O'Brien was 35 in Ready or Not as 'Alex Le Domas'.

Movie Released: Wed, Aug 21 2019

Goalie

Mark O'Brien was 34 in Goalie as 'Terry Sawchuk'.

Movie Released: Fri, Mar 01 2019

State Like Sleep

Mark O'Brien was 34 in State Like Sleep as 'Darren'.

Movie Released: Fri, Jan 04 2019

The Front Runner

Mark O'Brien was 34 in The Front Runner as 'Billy Shore'.

Movie Released: Tue, Nov 06 2018

Bad Times at the El Royale

Mark O'Brien was 34 in Bad Times at the El Royale as 'Larsen Rogers'.

Movie Released: Thu, Oct 04 2018

Kin

Mark O'Brien was 34 in Kin as 'Jake'.

Movie Released: Wed, Aug 29 2018

The Darkest Minds

Mark O'Brien was 34 in The Darkest Minds as 'Rob Meadows'.

Movie Released: Wed, Jul 25 2018

How It Ends

Mark O'Brien was 34 in How It Ends as 'Jeremiah'.

Movie Released: Fri, Jul 13 2018

Anon

Mark O'Brien was 33 in Anon as 'Cyrus Frear'.

Movie Released: Thu, May 03 2018

Parallel

Mark O'Brien was 33 in Parallel as 'Josh'.

Movie Released: Tue, Apr 10 2018

Arrival

Mark O'Brien was 32 in Arrival as 'Captain Marks'.

Movie Released: Thu, Nov 10 2016

The Dark Stranger

Mark O'Brien was 32 in The Dark Stranger as 'Mark'.

Movie Released: Fri, Jul 15 2016

How to Plan an Orgy in a Small Town

Mark O'Brien was 31 in How to Plan an Orgy in a Small Town as 'Bruce Buck'.

Movie Released: Sat, Sep 19 2015

End of Days, Inc.

Mark O'Brien was 30 in End of Days, Inc. as 'Jason'.

Movie Released: Fri, Apr 24 2015

Dennis

Mark O'Brien was 30 in Dennis as 'Dennis'.

Movie Released: Sat, Apr 18 2015

Beat Down

Mark O'Brien was 28 in Beat Down as 'Michael'.

Movie Released: Fri, Aug 03 2012

Snarbuckled

Mark O'Brien was 26 in Snarbuckled as 'Jacob O'Higgins'.

Movie Released: Sat, Sep 18 2010

Brad

Mark O'Brien was 26 in Brad as 'Brad'.

Movie Released: Sat, Jul 24 2010

Mum's the Word

Mark O'Brien was 25 in Mum's the Word as 'Curtis'.

Movie Released: Fri, Oct 23 2009

Grown Up Movie Star

Mark O'Brien was 25 in Grown Up Movie Star as 'Will'.

Movie Released: Tue, Oct 20 2009

Quiet at Dawn

Mark O'Brien was 25 in Quiet at Dawn as 'Watts'.

Movie Released: Tue, Sep 01 2009

Cut from the Same Cloth

Mark O'Brien was 24 in Cut from the Same Cloth as 'Jack Cochrane'.

Movie Released: Thu, Jan 01 2009

Heartless Disappearance Into Labrador Seas

Mark O'Brien was 24 in Heartless Disappearance Into Labrador Seas as 'Charlie'.

Movie Released: Tue, Sep 09 2008

Epilogue

Mark O'Brien was 24 in Epilogue as 'Henry'.

Movie Released: Fri, Jun 27 2008

The Four Horsemen

Mark O'Brien was 23 in The Four Horsemen as 'Eric Rollins'.

Movie Released: Tue, Mar 18 2008

The Voices of Our Mother

Mark O'Brien will be 40+ in The Voices of Our Mother as 'William'.

Movie Released: Unreleased

The Embers and the Stars

Mark O'Brien will be 40+ in The Embers and the Stars

Movie Released: Unreleased

Falsehood

Mark O'Brien will be 40+ in Falsehood as 'Elizeus Carrier'.

Movie Released: Unreleased

Nuremberg

Mark O'Brien will be 40+ in Nuremberg as 'Col. John Amen'.

Movie Released: Unreleased

TV Shows (Acting Roles)

Sorted by Release Date
Ages in TV shows are based off the first air date and may not be accurate. View individual episode details for accurate ages

The Sticky

Mark O'Brien was 40+ in The Sticky as 'Charlie'.

TV Show Released: First Air Date
Fri, Dec 06 2024

61st Street

Mark O'Brien was 37+ in 61st Street as 'Officer Logan'.

TV Show Released: First Air Date
Sun, Apr 10 2022

Your Honor

Mark O'Brien was 36+ in Your Honor as 'Father Jay'.

TV Show Released: First Air Date
Sun, Dec 06 2020

Perry Mason

Mark O'Brien was 36+ in Perry Mason as 'Thomas Milligan'.

TV Show Released: First Air Date
Sun, Jun 21 2020

The Kelly Clarkson Show

Mark O'Brien was 35+ in The Kelly Clarkson Show

TV Show Released: First Air Date
Mon, Sep 09 2019

City on a Hill

Mark O'Brien was 35+ in City on a Hill as 'Jimmy Ryan'.

TV Show Released: First Air Date
Sun, Jun 16 2019

The Last Tycoon

Mark O'Brien was 33+ in The Last Tycoon as 'Max Miner'.

TV Show Released: First Air Date
Fri, Jul 28 2017

Killjoys

Mark O'Brien was 31+ in Killjoys as 'Grayson Hicks'.

TV Show Released: First Air Date
Fri, Jun 19 2015

Halt and Catch Fire

Mark O'Brien was 30+ in Halt and Catch Fire as 'Tom Rendon'.

TV Show Released: First Air Date
Sun, Jun 01 2014

Hannibal

Mark O'Brien was 28+ in Hannibal as 'Randall Tier'.

TV Show Released: First Air Date
Thu, Apr 04 2013

Republic of Doyle

Mark O'Brien was 25+ in Republic of Doyle as 'Des Courtney'.

TV Show Released: First Air Date
Wed, Jan 06 2010

Warehouse 13

Mark O'Brien was 25+ in Warehouse 13 as 'Jerry Hoffler'.

TV Show Released: First Air Date
Tue, Jul 07 2009

Copenhagen

Mark O'Brien will be 40+ in Copenhagen as 'Cobb'.

TV Show Released: First Air Date
Unreleased