Edward Norton has revealed Timothee Chalamet was "relentless" in his approach to play Bob Dylan in 'A Complete Unknown'. The 55-year-old actor appears opposite the 'Dune' star, 28, in the upcoming biopic as folk singer Peter Seeger, and has now shared that Chalamet – who portrays Dylan – took playing the music icon very seriously, and shut off as many distractions as possible to fully immerse himself in the role. Norton told Rolling Stone magazine: "He was relentless.

No visitors, no friends, no reps, no nothing. [Chalamet said] 'Nobody comes around us while we’re doing this.' "We’re trying to do the best we can with something that’s so totemic and sacrosanct to many people.

And I agreed totally — it was like, 'We cannot have a f****** audience for this.' "We’ve got to believe to the greatest degree we can. And he was right to be that protective.

" As well as the 'Glass Onion: A Knives Out Mystery' actor, Elle Fanning – who portrays the 'Like A Rolling Stone' hitmaker's fictional university love interest Sylvie Russo - also offered some insight into Chalamet's commitment to the picture. The 26-year-old actress recalled listening to him perform some of Dylan's tracks for the flick – which is being directed by filmmaker James Mangold – and being blown away by his performance. She recounted: "We were in an auditorium, and I was sitting amongst all these background artists.

Jim would let Timmy come out and give the crowd a whole concert. "He was singing 'Master.