The “Dune” actor said he “turned over every stone” to fully embody the iconic folk singer in the Oscar-nominated biopic.

It might at first seem obvious why filmmakers won’t leave the subject of Bob Dylan alone. Search “Dylan” and “movies,” and the list — from documentaries like “Don’t Look Back” (1967) to fictionalized treatments like “I’m Not There” (2007) — turns out to be surprisingly extensive.