Movie Credits
Mark O'Brien has appeared in 13 movies.
These include Hammer, Ready or Not, Blue Bayou, Anon, The Front Runner, Arrival, How It Ends, How to Plan an Orgy in a Small Town, State Like Sleep, The Darkest Minds, Marriage Story, Bad Times at the El Royale and Kin.TV Credits
Mark O'Brien has appeared in 7 TV Series.
These include 61st Street, City on a Hill, Republic of Doyle, Halt and Catch Fire, Your Honor, Perry Mason and Warehouse 13.