‘Spider-Man: Brand New Day’ Gave Jean Grey a Ridiculous Fake Name to Keep Her Secret, and It Somehow Worked

Few casting mysteries in recent Marvel history have generated as much noise as the one surrounding Sadie Sink’s role in ‘Spider-Man: Brand New Day.’ From the moment the ‘Stranger Things’ alum joined the project, fans and scoopers spent months trying to crack what the studio was hiding.

Sink was cast in 2025 without her character being disclosed, and that secrecy carried through the entire marketing campaign of the film. She stayed tight-lipped throughout the press tour, even poking fun at the secrecy in videos posted on the film’s official social accounts.

The lengths the production went to protect that reveal extended all the way back to the page. According to a spoiler conversation Jacob Batalon had with The Hollywood Reporter, Jean Grey’s identity was disguised in the script itself under a codename — reportedly “Denim Red,” a nod that reads as almost comically on-the-nose given the character’s signature crimson hair.

That detail lands as a perfect punchline to what many observers considered one of the worst-kept secrets in modern blockbuster filmmaking. Marvel fans who remembered rumors that Marvel Studios wanted Sink to play Jean Grey had already connected the dots, and the evidence piled up when trailers teased a superhuman who could possess other people or hold entire crowds of New Yorkers frozen in place.

The codename wasn’t the only defensive measure. During promotional appearances, interviewers openly tried to bait Sink into cracking. At one U.S. junket, an interviewer posed a hypothetical about walking into a store and buying grey jeans, to which Sink simply replied that she was curious what he meant — an effective dodge, though she did admit it had been amazing and overwhelming to see all the theories.

Ultimately, the film itself did the confirming. Sink’s identity is shrouded in mystery as ‘Brand New Day’ begins, and her face isn’t revealed until roughly halfway through the movie. Tom Holland’s Spider-Man begins investigating a new villain in New York City who can possess bystanders’ bodies as long as they’re within 33 feet.

The teenage telepath possesses unsuspecting people and uses them to attack Department of Damage Control facilities, prompting Peter Parker to team up with police and DODC director Bill Metzger, played by Tramell Tillman. After Jean is taken into custody, Peter discovers that Metzger has been lying to him and is the film’s true antagonist.

Jean and her sister Sara, played by Olivia Booth-Ford, were abandoned by their mother after their powers manifested, and the siblings stuck together until the DODC kidnapped Sara. That grounding gives the character a sympathetic core rather than a straightforward villain arc.

Sink is now the third actress to play the character in live-action, following Famke Janssen and Sophie Turner. ‘Brand New Day’ effectively serves as the Jean Grey kickstart for ‘Thunderbolts’ director Jake Schreier’s ‘X-Men’ film.

All of this arrived alongside a historic commercial performance. The audience that showed up helped the fourth Holland-led Spidey installment surpass ‘Avengers: Endgame’ for the biggest domestic opening weekend of all time at $360 million. Whether the secrecy strategy actually contributed to that turnout or simply generated months of free conversation is a question the industry will be chewing on for a while.

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