Sadie Sink’s long-rumoured “mystery” role in Spider-Man: Brand New Day has been revealed, as the film lands in UK cinemas and the secrecy around her casting starts to fall away. Email address required Must be valid email Register By registering you agree to our Privacy Policy Thanks for registering! Sadie Sink’s mystery Spider-Man role has been revealed (Getty Images)After months of speculation, it has been confirmed that the Stranger Things star is playing Jean Grey, a member of the X-Men. But when Jean is caught on camera, Peter tracks her down and discovers she is Jean Elaine Grey. Film critic Siddhant Adlakha also weighed in via an X thread, writing: “Apparently someone ‘spoiled’ this on the red carpet tonight.