Young Caleb McLaughlin was nervous going into his first Fashion Week.

“This is different from what I do as an actor,” the 16-year-old “Stranger Things” star tells The Post at the 3.1 Phillip Lim show. “I thought people would be like, ‘who’s this kid?’ ”

But McLaughlin had nothing to worry about. He was swarmed by photographers, and actress Zosia Mamet and singer Kehlani were eager to have their pictures taken with him.

While the Lim show was his first time as a catwalk spectator, McLaughlin admits he’s long had an eye for fashion.

“I always coordinated different clothes and different designs together,” he says.