Who does Sadie Sink play in 'Spider-Man: Brand New Day'?

The biggest question surrounding Spider-Man: Brand New Day is a simple one: Who is Sadie Sink playing? Ever since Sink's casting was announced in 2025, fans have clamored to know what role she'd have in the MCU. Was she Gwen Stacy? Jean Grey? Rachel Summers? Marvel certainly wasn't telling. Trailers revealed precious little of Sink's performance, while Sink herself deftly parried any questions about her character throughout the film's press run. Truly, all we know from Marvel is that Sink's character "sits on a bench." That's it! Now, though, the film is out, and we can finally dig into Sink's role. Spoilers ahead, so this is your last chance to turn back if you want to experience the reveal in theaters. To whoever guessed that Sink would be playing Jean Grey, congratulations! You were right on the money. Sink plays the beloved Marvel mutant, who is also Spider-Man: Brand New Day's primary antagonist. In the X-Men comics and prior film adaptations, Jean is a powerful mutant gifted with telepathy and telekinesis. She's also the host for the cosmic Phoenix Force, which, when corrupted, turns her into the Dark Phoenix. Versions of the Dark Phoenix saga have come to the big screen twic