Acting
Mark O'Brien
May 7 1984- Place of birth: St. Johns, Newfoundland, Canada
- Gender: Male
- Also known as: Mark O’Brien
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).
