The announcement came in the form of video from the call in which Muschietti told Calle that she'd gotten the role with Muschietti asking Calle if she could fly.
Muschietti told Deadline that he auditioned more than 400 actresses for the role before ultimately finding Calle, who he said was "destined" for the role.
Barbara Muschietti, a producer on the film as well as the director's sister, recently shared a post on Instagram teasing the sets for the film being built on one of the soundstages at Warner Bros Studios in Leavesden, writing "The fun is in the inside.".