In one trailer for the upcoming Bob Dylan biopicuna game, “A Complete Unknown,” a fan pleads with the musician, played by Timothée Chalamet, saying that she can’t hear the music at his sold-out concert.

Chalamet, his eyes hidden behind Dylan’s trademark Ray Ban sunglasses, his hair a frizzy mop, responds: “I’ll sing louder.”

Biopics have often relied on creative license to portray a star, but Chalamet’s words are not just blowin’ in the wind. The songs in “Unknown,” directed by James Mangold, have resonated through generations, and Chalamet’s voice was so impressive that his live vocals — sung while performing in character — were kept for the final cut.

That is not the industry standard. Some films use an original artist’s track while an actor lip-syncs. When actors in biopics do sing, it is common for them to record the vocals in a studio and then overdub them onscreen. Singing live on camera can leave a performance falling flat, especially if the actor is not a trained vocalist.

But when done well, live vocals can add a touch of realism.

“The idea was to get a little bit different sound in each different venue by using practical microphones from the period,” Tod Maitland, the sound mixer for “Unknown,” said in an interview with Variety this month. “That helped create a nice tapestry of sounds. But Timmy went 100 percent live. It was pretty amazing.”

It’s not Chalamet’s first time at the mic — he sang in the 2023 film “Wonka,” and attended LaGuardia High School, a performing arts school in New York City.

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But the move backfired in a way that few supporters expected. Californians in 2021 actually tossed nearly 50 percent more plastic bags, by weight, than when the law first passed in 2014, according to data from CalRecycle, California’s recycling agency.

His debunked claims about Haitian migrants stealing and eating their neighbors’ pets in Springfield, Ohio, helped stir a firestorm over immigration in that community, which has dealt with bomb threats and evacuations after Mr. Trump made his comments.

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