Marcia Gay Harden and Toby Jones have become enshrouded in “The Mist.”

Frank Darabont is directing Dimension Films’ adaptation of the Stephen King novella (Daily Variety, Oct. 19). Production has begun shooting.

Story revolves around a group of people who hole up in a supermarket after a deadly mist covers a town and unleashes a swarm of murderous critters.

Thomas Jane, Andre Braugher and Amin Joseph were previously cast. Darabont, who previously adapted and directed King tales “Shawshank Redemption” and “The Green Mile,” wrote the script. Castle Rock’s Martin Shafer and Liz Glotzer produce with Darabont.

Dimension co-chairman Bob Weinstein and production prexy Richard Saperstein are working on a King trifecta: They completed production on a feature adaptation of the King novella “1408” that stars Samuel L. Jackson and John Cusack, and they have “Hostel” helmer Eli Roth developing the King bestseller “Cell.”