Mark O'Brien

Birthday: May 07, 1984

Place of birth: St. Johns, Newfoundland,

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 (2013)

8.2

Randall Tier

Arrival (2016)

7.6

Captain Marks

The Darkest Minds (2018)

7.04

Rob Meadows

Ready or Not (2019)

7.06

Alex Le Domas

Bad Times at the El Royale (2018)

6.84

Larsen Rogers

Marriage Story (2019)

7.74

Carter Mitchum

How It Ends (2018)

5.28

Jeremiah

Anon (2018)

5.97

Cyrus Frear

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As an actor

Seven Veils (2025)

Paul

The Righteous (2021)

Aaron Smith

Blue Bayou (2021)

Ace

State Like Sleep (2019)

Darren

Ready or Not (2019)

Alex Le Domas

Marriage Story (2019)

Carter Mitchum

Hammer (2019)

Chris Davis

Parallel (2018)

Josh

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Movie crew

The Righteous (2021)

Executive Producer

View all movies (22)