Sadie Sink’s long-secret part in Spider-Man: Brand New Day has now been officially unveiled as the film arrives in theaters. The reveal ends months of fan speculation surrounding the Stranger Things star’s Marvel debut and confirms the identity of the character she was brought in to play.

Before the movie’s release, Sink had kept details tightly under wraps, saying audiences would have to wait and see. That secrecy helped make her casting one of the most closely watched elements of the new Spider-Man installment, especially as interest grew around how fresh faces would fit into the franchise.

Entertainment Weekly framed the update as a spoiler development tied directly to the opening of Brand New Day, signaling that the answer is meant for viewers who are either already seeing the film or ready to know more about its major surprises. The timing suggests Marvel and Sony allowed the mystery to hold until opening weekend rather than settling it during the promotional campaign.

The character confirmation is likely to be a major talking point among fans discussing where Spider-Man: Brand New Day takes the story next. For Sink, it marks a high-profile entry into one of Hollywood’s biggest superhero series at a moment when audience attention is focused on every new addition to the cast.