Mark O'Brien profile photo

Mark O'Brien

Acting

Fresh tomato
80%
AVG SCORE · 2 TITLES

Born May 7, 1984 (age 41) · St. Johns, Newfoundland, Canada

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).

Filmography

by popularity
Nuremberg (2025) movie poster - 71% on Rotten Tweets
Fresh tomato
71%
Nuremberg
2025Film
as Colonel John Amen
Ready or Not (2019) movie poster - 89% on Rotten Tweets
Fresh tomato
89%
Ready or Not
2019Film
as Alex Le Domas