- Primary Subject: Sadie Sink’s casting and mystery role in Marvel Studios’ Spider-Man: Brand New Day.
- Key Update: In a revealing new interview, Sadie Sink shared that Marvel kept her character a total secret—offering her the role without an audition and withholding the script until she arrived on set.
- Status: Confirmed / Role Undisclosed
- Last Verified: July 2, 2026
- Quick Answer: Sadie Sink landed her highly secretive Spider-Man: Brand New Day role without an audition after being directly cast by director Destin Daniel Cretton.
The Marvel Cinematic Universe is famous for keeping its secrets locked away in a high-security vault, but the studio just reached a whole new level of lockdown for Spider-Man: Brand New Day.
With the highly anticipated blockbuster swinging into theaters on July 31, 2026, fans have been desperately scouring trailers to figure out who Stranger Things breakout star Sadie Sink is playing.
Sadie Sink Literally Did Not Know What She Signed up for in the MCU
As it turns out, fans weren’t the only ones left completely in the dark. In a brand-new profile interview, the 24-year-old actress revealed the mind-boggling story of how she landed a massive role in the web-slinger’s next chapter without ever seeing a script.
In a new cover story with Nylon, Sink pulled back the curtain on Marvel's extreme spoiler-prevention tactics. In a magical Hollywood twist of fate, the sudden offer came straight from Spider-Man: Brand New Day director Destin Daniel Cretton, because he knew exactly what she was capable of.
"Sink was offered her role without an audition, having worked with director Destin Daniel Cretton on the 2017 film, The Glass Castle," the publication wrote, "And she didn't receive a script until she landed in London."
Fortunately, Sink notes that keeping Marvel's secrets has been a breeze thanks to her nine years of dodging Stranger Things spoilers: "You just don't share the secret, it's not that hard."
"I knew that Marvel was a big deal and had a big brand, especially Spider-Man," Sink added, "I know there's a huge fan base, but it feels really big. I think these blockbuster movies are a whole different beast."
What We Know So Far About Sadie Sink’s Spider-Man: Brand New Day Role
Marvel's marketing department has deliberately scrubbed Sink from the trailers and TV spots, which has only spun the internet's rumor mill out of control.
The prevailing theory among comic book purists is that Sink could be playing between these two characters: a younger version of the iconic X-Men telepath Jean Grey or being Peter Parker's alternative-universe sister, Mayday Parker.
Other corners suspect she could be playing a younger Wanda Maximoff, Peter Parker's comic-book love interest Gwen Stacy, or even a mind-controlling villain designed to manipulate the movie's roster of street-level rogues like the Punisher and Scorpion.
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