Written by Image Credit: Netflix
Marvel has remained tight-lipped about Sadie Sink‘s character in Spider-Man: Brand New Day. Fans have been bringing new theories about Sink’s mysterious character ever since she locked in as an official cast member in Spider-Man 4. The majority of the fans believed that she would play Jean Grey, one of X-Men’s most iconic characters.
While that’s not officially confirmed, a new rumor has given fans fresh reason to believe it could be true. Instead of directly revealing the character, the latest report shifts attention to another member of Jean Grey‘s family. If the claim turns true, it could mean that Jean Grey is indeed part of the movie, making Sadie Sink’s long-rumored casting feel more likely.
New speculation Shifts Attention to Another Rumored Spider-Man: Brand New Day Character
According to Industry Insider, Cryptic HD Quality, Spider-Man: Brand New Day will feature Jean Grey’s sister, Sarah Grey. British actor Olivia Booth-Ford will reportedly play that role. The insider previously claimed that Jacey Sink, Sadie Sink’s sister, will appear in Brand New Day. However, he now states that the rumor remains unconfirmed.
Confirming this past scoop.Also, my final BND scoop: my rumor about Jacie Sink being in the film remains unconfirmed. However, Jean’s sister is in the film, and she is played by Olivia Booth-Ford. https://t.co/DgYHLdHCnh pic.twitter.com/Z56GSXM5QO— Cryptic HD QUALITY (@Cryptic4KQual) July 27, 2026
Jacey has previously played the younger versions of Sadie Sink’s role in Stranger Things and The Whale. That said, fans have started to believe that Jacey and Sadie could portray younger and older versions of the same character in Brand New Day; this time, it is Jean Grey. The new claim changes that theory.
With Jacie Sink’s reported involvement now uncertain, Sara Grey’s appearance would suggest that Jean Grey herself plausibly plays a role in the story. That said, Sadie Sink’s long-rumored casting as Jean Grey feels much more imminent.
Image Credit: Apple TV+
Cryptic HD Quality has a solid history of providing accurate Marvel Studios details. The scooper accurately reported the runtime for Fantastic Four: Four Steps and the title for Brand New Day before official confirmations. However, not every rumor that surfaces online is true, so fans should take this with a pinch of salt.
Marvel Studios has yet to confirm any of the rumored castings. Until then, the latest rumor remains speculation, but it has only strengthened the belief that Sadie Sink could be the MCU’s Jean Grey when Spider-Man: Brand New Day arrives on July 31, 2026.
