← Back to explore

Mark O'Brien

Acting

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

Also known as Mark O’Brien

IMDbWikipedia

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).

Filmography37 titles

Hannibal

2013as Randall Tier

Your Honor

2020as Father Jay

Halt and Catch Fire

2014as Tom Rendon

Marriage Story

2019as Carter Mitchum

Warehouse 13

2009as Jerry Hoffler

Nuremberg

2025as Colonel John Amen

Arrival

2016as Captain Marks

Blue Bayou

2021as Ace

City on a Hill

2019as Jimmy Ryan

The Sticky

2024as Charlie

Perry Mason

2020as Thomas Milligan

Ready or Not

2019as Alex

The Darkest Minds

2018as Rob Meadows

The Last Tycoon

2016as Max Miner

Republic of Doyle

2010as Des Courtney

61st Street

2022

Goalie

2019as Terry Sawchuk

Killjoys

2015as Grayson Hicks

Bad Times at the El Royale

2018as Larsen Rogers

The Copenhagen Test

2025as Edmund Cobb

The Kelly Clarkson Show

2019as Self

The Righteous

2021as Aaron Smith

Kin

2018as Jake

Anon

2018as Cyrus Frear

Parallel

2018as Josh

The Front Runner

2018as Billy Shore

Shadow of God

2025as Mason Harper

End of Days, Inc.

2015as Jason

Seven Veils

2023as Paul

Hammer

2019as Chris Davis

Topper

2025as Topper

How It Ends

2018as Jeremiah

How to Plan an Orgy in a Small Town

2015as Bruce Buck

The Dark Stranger

2016as Mark

State Like Sleep

2018as Darren

The One That Got Away

2008as Tommy Palchek

Epilogue

2008as Henry