Rapper-singer Kyle makes his acting debut — credited under his full name, Kyle Harvey — as an aspiring emcee in “The After Party,” a Netflix film that premieres on Friday. And for Harvey, the real after-party to end all after-parties took place this past December at the Miami mansion of a hip-hop icon: Sean “Diddy” Combs.

“We did a show with the Fader,” says Harvey of his performance during the Art Basel fair, “and then after, somehow we get an address [for an after-party] that’s supposed to be Diddy’s house.” Undeterred by the lack of a proper invite, Harvey and crew rolled up to the spot. “We walk up to the front, one of Diddy’s sons knows me and lets me in, and we end up at Diddy’s after-party until, like, 6 or 7 a.m. It was the greatest thing I’ve ever been a part of.”

Harvey — who got to mingle with the likes of Drake and Lil Wayne at the Diddy bash — has been moving in starry circles since scoring a Top-5 hit last year with his single “iSpy” (featuring Lil Yachty) and then releasing his debut album, “Light of Mine,” in May. Now, in “The After Party,” the 25-year-old artist rubs shoulders with Wiz Khalifa, French Montana and DJ Khaled as his character Owen, a recent high-school grad, goes forth in comical pursuit of a record deal.

Growing up in Ventura, Calif., Harvey — who, like Owen, has a black father and a white mother — started singing at 6 (“The very first song I ever memorized was ‘Back at One’ by Brian McKnight”) and then became a “baby rapper” after hearing Ol’ Dirty Bastard’s “Got Your Money” when he was 9. “I would be battle-rapping [against] grown men my whole childhood,” he says.

Long before he would drop his first mixtape, 2013’s “Beautiful Loser,” a 13-year-old Harvey even marched by himself into Capitol Records in Hollywood on a mission to land a deal. “I just went in there and said, ‘I’m a rapper. I need to be famous,’” Harvey recalls of his pitch at reception. “I didn’t really have any type of game plan or anything. And they were just like, ‘Aww, that’s really cute. Keep it up.’”

In “The After Party,” Owen is planning to join the Marines if he doesn’t get a record deal by a looming deadline. So what would Harvey have done if he hadn’t made it in the music biz?

“I told myself in high school that I was gonna be a history teacher if nothing didn’t work out,” he says. “But before I became a rapper full time, I was a gas-meter reader for the Southern California Gas Company. Thinking back about it, if I didn’t become a [successful] rapper, I would still be there doing that. So God is great.”