Mark O'Brien

TV Actor

Birthday May 7, 1984

Birth Sign Taurus

Birthplace St. John's, Canada

Age 41 years old

#20,303 Most Popular

About

Canadian actor who has won acclaim for television roles like Des Courtney on Republic of Doyle and Tom Rendon on Halt and Catch Fire. He played Colonel John Amen in the 2025 movie Nuremberg. 

Before Fame

He earned a Bachelor of Arts from Memorial University of Newfoundland. 

Trivia

He was nominated for Canadian Comedy Awards for his performance on Republic of Doyle in 2011 and 2014. He has amassed more than 30,000 followers on Instagram. 

Family Life

He married actress Georgina Reilly in 2013. He has three older sisters. 

Associated With

He has co-starred with Lee Pace on AMC's Halt and Catch Fire.