Actor

Mark O'Brien

Contemporaryb. 1984DramaThrillerComedySci-Fi

Chronicler of the Human Condition

Also directed 8 films ↗Also wrote 4 screenplays ↗

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Known For

38 acting credits

as Captain Marks

Arrival

as Captain Marks

2016

Arrival

as Carter Mitchum

Marriage Story

as Carter Mitchum

2019

Marriage Story

Filmography

2026The Voices of Our MotherWilliam 2025Seven VeilsPaul5.6 2025Shadow of GodMason Harper5.7 2025NurembergColonel John Amen7.5 2025The Memory KeeperElizeus Carrier 2025TopperTopper5.3

About

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).

As Director

Full director page ↗

2021The Righteous 2016Wanderer 2026The Voices of Our Mother 2011Kathy —Better People 2013Sweetieface

As Screenwriter

Full writer page ↗

2021The Righteous 2026The Voices of Our Mother —Better People 2008Pretty Girls

Data provided by The Movie Database (TMDB)