Mark O'Brien

Mark O'Brien

Acting

Birthday

1984/05/07 (40 years old)

Gender

Male

Place of Birth

St. Johns, Newfoundland, Canada

Also know as

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
Seven Veils
0.0

(2025) Seven Veils

as Paul

The Four Horsemen
3.9

(2008) The Four Horsemen

as Eric Rollins

Grown Up Movie Star
5.4

(2009) Grown Up Movie Star

as Will

0.0

(2009) Cut from the Same Cloth

as Jack Cochrane

Heartless Disappearance Into Labrador Seas
0.0

(2008) Heartless Disappearance Into Labrador Seas

as Charlie

0.0

Shadow of God

as Mason Harper

Snarbuckled
0.0

(2010) Snarbuckled

as Jacob O'Higgins

The Dark Stranger
5.1

(2016) The Dark Stranger

as Mark

Nuremberg
0.0

Nuremberg

as Col. John Amen

End of Days, Inc.
5.6

(2015) End of Days, Inc.

as Jason

0.0

The Voices of Our Mother

as William

Beat Down
0.0

(2012) Beat Down

as Michael

Arrival
7.6

(2016) Arrival

as Captain Marks

Anon
6.0

(2018) Anon

as Cyrus Frear

State Like Sleep
4.9

(2019) State Like Sleep

as Darren

Kin
6.1

(2018) Kin

as Jake

Parallel
6.0

(2018) Parallel

as Josh

The Darkest Minds
7.0

(2018) The Darkest Minds

as Rob Meadows

How to Plan an Orgy in a Small Town
5.2

(2015) How to Plan an Orgy in a Small Town

as Bruce Buck

Bad Times at the El Royale
6.8

(2018) Bad Times at the El Royale

as Larsen Rogers

Marriage Story
7.7

(2019) Marriage Story

as Carter Mitchum

The Front Runner
5.9

(2018) The Front Runner

as Billy Shore

How It Ends
5.3

(2018) How It Ends

as Jeremiah

Goalie
6.8

(2019) Goalie

as Terry Sawchuk

Hammer
5.4

(2019) Hammer

as Chris Davis

Ready or Not
7.0

(2019) Ready or Not

as Alex Le Domas

Blue Bayou
7.5

(2021) Blue Bayou

as Ace

The Righteous
6.1

(2021) The Righteous

as Aaron Smith

0.0

Mum's the Word

as Curtis

0.0

(2008) Epilogue

as Henry

0.0

(2010) Brad

as Brad

0.0

The Embers and the Stars

as ---

Dennis
0.0

(2015) Dennis

as Dennis

0.0

Falsehood

as Elizeus Carrier

Perry Mason
7.3

(2020) Perry Mason

as Thomas Milligan

Republic of Doyle
7.0

(2010) Republic of Doyle

as Des Courtney

The Last Tycoon
7.2

(2017) The Last Tycoon

as Max Miner

61st Street
6.6

(2022) 61st Street

as Officer Logan

Killjoys
6.9

(2015) Killjoys

as Grayson Hicks

The Kelly Clarkson Show
6.3

(2019) The Kelly Clarkson Show

as ---

City on a Hill
7.4

(2019) City on a Hill

as Jimmy Ryan

Hannibal
8.2

(2013) Hannibal

as Randall Tier

Warehouse 13
7.7

(2009) Warehouse 13

as Jerry Hoffler

Halt and Catch Fire
7.9

(2014) Halt and Catch Fire

as Tom Rendon

Your Honor
8.1

(2020) Your Honor

as Father Jay

0.0

Copenhagen

as Cobb

The Sticky
7.5

(2024) The Sticky

as Charlie