From musical festival violence to the pen pal bond between Johnny Cash and Bob Dylan, Mangold tells us what's real and what's not in "A Complete Unknown."

Director James Mangold talked to BI about Timothée Chalamet's dedication to playing Bob Dylan and only making a "Star Wars" movie if it's excellent.

"Yeah, he was growing them," "A Complete Unknown" director James Mangold told Business Insider. "If you look earlier in the movie, there are some scenes where they aren't as long, but by the end, he had some full-on Nosferatu going on."