Sadie Sink is going from the upside down to the multiverse. It's been announced that the 'Stranger Things' actress is joining Tom Holland in 'Spider-Man 4.' The plot for the fourth 'Spider-Man' is being kept under wraps, with the last film, 'No Way Home,' ending with the world forgetting that Peter Parker was Spider-Man, including MJ played Zendaya. It's unclear who Sink will play in the film.