In “A Complete Unknown,” Timothée Chalamet does his own singing and playing on guitar and harmonica — after five years of studying to master the music of Bob Dylan.

Chalamet not only sang all of Dylan's song for the film — he actually performed the songs live on camera, giving James Mangold, the movie's director, and others on the set "chills," Mangold told an audience at the WGA during a post-screening in Beverly Hills this month, according to Variety.