Mark Wahlberg has signed up to play notorious international drug dealer JON ROBERTS in an upcoming movie. The Departed actor will star as Roberts in the currently-untitled film to be helmed by The Kingdom director, Peter Berg. Vietnam War veteran Roberts started distributing millions of dollars' worth of cocaine out of Miami, Florida in the late 1970s before eventually serving a decade in jail. Roberts' story has previously been told in the documentary Cocaine Cowboys.