Spacek -- who headlined the 1976 film adaptation of King's classic novel Carrie -- will play Ruth Deaver, "estranged, adoptive mother of Henry [played by Andre Holland,] a retired professor whose fading memories may hold a key to Castle Rock's unsettling past," a press release noted.
Levy will play Jackie, "the death-obsessed, self-appointed historian of Castle Rock."
Sam Shaw and Dustin Thomason developed the series and are serving as executive producers, along with J.J. Abrams, Ben Stephenson and Liz Glotzer.
CASTING NEWS: Sissy Spacek has been cast in the upcoming Hulu Original Castle Rock. pic.twitter.com/YReVAmcyOD— hulu (@hulu) June 26, 2017