Sadie Sink plays Jean Grey in Spider-Man: Brand New Day, marking the character’s first confirmed appearance in the MCU and potentially signalling the franchise’s plans for the X-Men. The film initially keeps her identity hidden, presenting her as a telepathic threat whose actions bring her into conflict with Peter Parker.

Jean is depicted as a young, angry mutant searching for her sister Sara, who was taken and experimented on by the Department of Damage Control. Her ability to possess other people is shown through coordinated performances rather than obvious visual effects, and her introduction is expected to connect to director Jake Schreier’s forthcoming X-Men film.