‘‘We were sequestered in Luca’s town, in his story and in his understanding of Italy and the youth of the ’80s,’’ Chalamet says. He arrived in the city of Crema several weeks before filming began to learn Italian and guitar, and to brush up on his piano playing (his character is musical); he would bike between the lessons and often stopped by Guadagnino’s apartment for lunch. ‘‘I wonder if I’ll ever have another acting experience again that’s so immersive.’’

SHOP SIX PLAID FLANNEL SHIRTS FOR FALL, INSPIRED BY THIS PHOTO SHOOT.

Grooming by Tamas Tuzes at L’Atelier NYC using Bumble & Bumble. Tailoring by Carol Ai. Stylist’s assistants: Kelly Harris and Jeremy Anderegg