Noah Schnapp talks filming ‘Stranger Things’ during puberty

They can’t stay young forever.

“Stranger Things” star Noah Schnapp recalled the time a producer of the hit Netflix show approached him in an earlier season and asked if he could alter his voice to sound more like his seventh-grade character, Will Byers.

“It was the peak time of change, and puberty and growing up and just everything was changing with all of us, and the directors were just not loving it,” Schnapp said in an interview with Flaunt.

“And I remember one of the producers coming up to me and telling me, ‘Noah, is there any way you could just speak in a higher tone and just slouch a little bit? Like, we need you to keep that Season 1 innocence that you had.’ “

While the show’s main cast ranged from around 12 to 14 years old when it premiered in 2016, the show’s filming schedule couldn’t compete with the growth spurts of Millie Bobby Brown, Finn Wolfhard, Gaten Matarazzo and Caleb McLaughlin.

Will was supposed to be 14 or 15 in Season 4 of “Stranger Things,” but he’s pushing 18 in the real world.

“That was like, ‘I don’t know what to tell you. My voice is dropping. I don’t sound young anymore,’ ” he recalled telling the producer.

Most teens cringe at their coming-of-age photos, but Schnapp said he embraces his youth being documented.

“It’s just crazy,” he explained, “because I get to watch not only this character, but myself grow up onscreen.

“Now I’ll be able to always have this archive of me as a 10-year-old actor, and me now, and I’ll be able to show that to my kids, and it’s just crazy that that’ll live there forever,” he added.

Schnapp heads to the University of Pennsylvania this fall but got a lesson in social media etiquette this summer when he posted a private conversation with Doja Cat about his co-star, Joseph Quinn’s, relationship status.

Doja Cat, 26, then freaked out and called the teenager “unbelievably socially unaware and whack” on Instagram Live.

However, the two later made amends and Schnapp told his TikTok followers that “it’s all good” between him and the “Need To Know” singer.