As shown in A Complete Unknown, singers Bob Dylan and Johnny Cash created a friendship in real life, but some true details are altered or left out.

A Complete Unknown director James Mangold has explained why it was so important to include Johnny Cash as a central figure in his new Bob Dylan biopic. Based on the 2015 book Dylan Goes Electric!, Mangold’s latest biographical drama features Dune’s Timothée Chalamet as a young Dylan throughout his early career as a folk singer,

The filmmaker first tackled the life of Johnny Cash in 2005's Walk the Line, which garnered tons of acclaim, including an Oscar win for Reese Witherspoon and a nomination for Joaquin Phoenix. Now, Mangold returns to Cash in A Complete Unknown, another musical biopic, this time centered on the rise of a young Bob Dylan ( Timothée Chalamet ).