Timothée Chalamet, Edward Norton and other stars of Bob Dylan film "A Complete Unknown" spent months learning to sing and play to re-create the past.

The actor spent years preparing to play the legendary singer, learning the harmonica and guitar in the process.

Timothée Chalamet’s lauded transformation into rock icon Bob Dylan in “A Complete Unknown” was so complete, it went all the way down to his cuticles. The “Dune 2” actor, 28, ended rampant speculation about whether the surprisingly long fingernails he has in the new biopic (out Dec. 25) are actually his own during an interview with Fandango.