ET can confirm that the actress will be joining Dakota Johnson in the upcoming Spider-Man spin-off, Madame Web.
It was announced last month that Johnson is set to play the film's titular character, making her the first female-headlining hero in the Sony-Marvel cinematic universe. S.J. Clarkson is directing the film, after previously helming episodes of some of the Marvel-Netflix series like Jessica Jones and The Defenders, with a screenplay from Matt Sazama and Burk Sharpless.
In the comic canon, Madame Web is a clairvoyant mutant, who has served as a mentor to Peter Parker's Spider-Man, as well as several heroes calling themselves Spider-Woman. She is traditionally depicted as an old woman kept alive via a life support system that resembles a spider web, however, it's not yet known how the upcoming film will adapt the character -- or who Sweeney will play in the film.
Madame Web joins Sony's growing slate of Spider-Man spinoffs, including 2021's Venom: Let There Be Carnage and the upcoming, Jared Leto-starring, Morbius. Their most recent, Spider-Man: No Way Home, has grossed $1.87 billion globally to date, the highest in Sony history.