Mark O'Brien

Personal Info

Birthday

May 7, 1984

(41 years old)

Place of Birth

St. Johns, Newfoundland, Canada

Also Known As

Mark O’Brien

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).

Known For

Hannibal

Warehouse 13

Perry Mason

Killjoys

City on a Hill

Arrival

Halt and Catch Fire

Your Honor

Filmography

2025
Nuremberg
as Colonel John Amen
Shadow of God
as Mason Harper
Seven Veils
as Paul
Topper
as Topper
2021
Blue Bayou
as Ace
The Righteous
as Aaron Smith
2019
Hammer
as Chris Davis
Marriage Story
as Carter Mitchum
Ready or Not
as Alex Le Domas
Goalie
as Terry Sawchuk
State Like Sleep
as Darren
2018
The Front Runner
as Billy Shore
Bad Times at the El Royale
as Larsen Rogers
Kin
as Jake
The Darkest Minds
as Rob Meadows
How It Ends
as Jeremiah
Anon
as Cyrus Frear
Parallel
as Josh
2016
Arrival
as Captain Marks
Wanderer
as Eric
The Dark Stranger
as Mark
2015
How to Plan an Orgy in a Small Town
as Bruce Buck
End of Days, Inc.
as Jason
Dennis
as Dennis
2013
Sweetieface
as Sam
2012
Beat Down
as Michael
2010
Snarbuckled
as Jacob O'Higgins
Brad
as Brad
2009
Mum's the Word
as Curtis
Grown Up Movie Star
as Will
Quiet at Dawn
as Watts
Cut from the Same Cloth
as Jack Cochrane
2008
Heartless Disappearance Into Labrador Seas
as Charlie
Epilogue
as Henry
The One That Got Away
as Tommy Palchek
The Four Horsemen
as Eric Rollins