Sadie Sink reveals who knew her secret Spider-Man role
In an exclusive PEOPLE interview, Sadie Sink revealed she let only family and close friends in on her top-secret Spider-Man: Brand New Day character—not the press. The Stranger Things star said she was “kind of a vault,” happy to keep the Marvel mystery under wraps for roughly a year and a half.
Key Takeaways
- Sadie Sink told PEOPLE that family and close friends knew her secret Spider-Man role, but not the press.
- She kept the Brand New Day character under wraps for more than a year, calling herself “kind of a vault.”
- Fans floated Jean Grey, Gwen Stacy, Mayday Parker, and Rachel Summers theories before the film’s release.
- Director Destin Daniel Cretton said there is a “very real reason” Marvel withheld her character identity.
- Spider-Man: Brand New Day opens in theaters Friday, July 31, 2026.
Who did Sadie Sink tell about her Spider-Man role?
Speaking exclusively to PEOPLE at the Los Angeles premiere on Monday, July 27, the 24-year-old Stranger Things alum confirmed she did let the secret slip—but only to a tight circle.
“Yeah, for sure,” Sink said when asked if anyone knew. “My family knew, my friends, close friends knew, but yeah, just not the press.”
That answer settles the main question around the sadie sink spider man secrecy campaign: loved ones were in on it; reporters were not. She also admitted strangers sometimes guessed her character to her face, forcing her to play it cool—something she said “happens all the time online.”
Why was her Brand New Day character kept so secret?
“I’m kind of a vault, so it wasn’t that hard,” Sink told PEOPLE of staying quiet. She added she was “mostly just so excited to join this universe,” so keeping the secret for “a year and a half or however long it’s been” felt fine.
Brand New Day director Destin Daniel Cretton later told Rolling Stone the holdback was intentional. “You’ll see when you watch the movie that there’s a very real reason not to tell people who Sadie Sink is playing,” he said, predicting audiences would be glad they did not know in advance.
The campaign still sprang leaks elsewhere: musician Steve Lacy, whose song appears in the film, named Sink’s character during a red-carpet premiere livestream after an interviewer asked—with a no-spoilers caveat—which character excited him most, sparking a social media crash-out.
What fan theories surrounded Sadie Sink’s Spider-Man role?
With Marvel keeping her identity closely guarded and Sink appearing sparingly in trailers, fans filled the gap. Online speculation ranged from Jean Grey—a casting many argued could help bring the X-Men into the MCU—to Gwen Stacy, plus Mayday Parker and Rachel Summers.
Sink even joked on the film’s official Instagram that she could only confirm she was not playing Spider-Man or Aunt May—just that she was actually in the movie. Now inside the MCU, she praised exploring a new character with a “supportive and welcoming” cast and called Brand New Day “a fun movie.”
For more breaking entertainment alerts and related coverage, visit BlasterPost’s Fintech & Crypto Alerts hub. Spider-Man: Brand New Day hits theaters Friday, July 31.