• Timothée Chalamet plays Bob Dylan in the movie "A Complete Unknown."
• He was so immersed in the role that he even grew his fingernails long like Dylan.
• "He had some full-on Nosferatu going on," director James Mangold told BI of how Chalamet looked by the end of filming.

If you look close enough while watching "A Complete Unknown," in which Timothée Chalamet completely immerses himself in playing Bob Dylan, you'll notice what many online have pointed out — Chalamet's nails are quite long.

Some even observed Chalamet's lengthy nails when photos from the set were released online. A TikTok video highlights them, and journalist Hunter Harris dedicated an entire post on her Substack back in June to Chalamet's "aprés nail tips."

So, are those fake nails, or did Chalamet grow his out for the role?

"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."

There are theories online about why Dylan grew out his nails — from the nails helping him fingerpick while playing his guitar to simply having bad hygiene. We couldn't find Dylan on the record to explain. Business Insider reached out to the 83-year-old to find out, but he didn't respond to our very important query on this matter.

For Chalamet, however, it's another example of how deep he went into the role for the biopic, which is out Christmas Day. A November Rolling Stone cover story chronicled how the actor submerged himself into the character while filming, including keeping to himself on set, always speaking in Dylan's voice, and singing his songs like "The Times They Are A-Changin.'"

'A Complete Unknown' director said he understands why Chalamet did Method acting on set

Mangold scoffed at the "Method" acting narrative, saying that Chalamet speaking like Dylan even when cameras weren't rolling is a trick actors often do when playing a character with a unique voice.

"Timmy's not the only person whose ever done that, that's true for most of the actors in my movies doing dialects," he said. "They don't just do it and fall out of it the second the scene ends."

"You're also trying to make it more and more internalized. You're trying to make it something you don't have to think about," Mangold continued. "So if you're turning it on and off, you're kind of making yourself hyper-aware of it."

"A Complete Unknown," which also stars Scoot McNairy, Edward Norton, and Elle Fanning, will be released in theaters on December 25.