Mark O'Brien 05/07/1984 , (40 years old) in St. Johns, Newfoundland, Canada

Known for department

Acting

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).