What a difference a decade makes. When Timothée Chalamet arrives at this year’s Berlinale for a special gala screening of James Mangold’s A Complete Unknown, in which he plays an inscrutable Bob Dylan, he’ll be hailed as a star: He’s headlined such blockbusters as Wonka and the Dune movies and also just earned his second best actor Oscar nomination.
When Chalamet first walked Berlin’s red carpet in 2015, it was a different story. Then just 19, he was starring opposite…