Sadie Sink Joins Spider-Man: Brand New Day Cast

Sadie Sink, known for her role as Max Mayfield in Netflix's Stranger Things, has joined the cast of the upcoming Marvel Cinematic Universe film Spider-Man: Brand New Day, though details about her character remain under wraps, fueling widespread fan speculation.

The film, directed by Destin Daniel Cretton and written by Chris McKenna and Erik Sommers, marks the fourth solo Spider-Man movie starring Tom Holland as Peter Parker. Production is currently underway in London, with filming expected to wrap in mid-December. Sink's involvement was first reported in March, and she is set to reprise her role in a future Avengers installment, adding to the intrigue surrounding her MCU debut. The movie is scheduled for release on July 31, 2026.

Sink's casting has sparked numerous theories about her character, largely centered on her distinctive red hair. Fans have suggested possibilities ranging from X-Men member Jean Grey to Spider-Girl Mayday Parker, Gwen Stacy, Madelyne Pryor, Firestar, or even Rachel Cole-Alves, the redheaded sidekick to the Punisher, who will appear in the film played by Jon Bernthal. In a recent interview with Entertainment Weekly, Sink addressed the buzz with a...