According to experts, the upcoming Bob Dylan biopic, A Complete Unknown, is in safe hands as fans and music historians react to the first trailer. James Mangold's upcoming film, starring Timothe Chalamet, is the second fictional feature telling the life story of the iconic music legend. I'm Not There, released in 2007, took an abstract approach to Bob Dylan's life as multiple characters embodied different aspects of Dylan's work across his long and storied career.