Lionsgate’s The Long Walk has added more cast members for the upcoming adaptation of the Stephen King novel of the same name. Deadline announced the additions of Judy Greer (The Best Christmas Pageant Ever) and Mark Hamill (The Life of Chuck). Their roles, however, are being kept under wraps.

Greer and Hamill join Garrett Wareing (Ransom Canyon), Tut Nyuot (The Witcher: Blood Origin), Charlie Plummer (National Anthem), Ben Wang (American Born Chinese), Jordan Gonzalez (Pretty Little Liars: Summer School), Joshua Odjick (Welcome to Derry), and Roman Griffin Davis (Jojo Rabbit).

In The Long Walk, “The country holds an annual walking contest in which 100 teens must journey, non-stop and under strict rules, until only one of them is still standing alive and receiving a prize. The story told of a 16-year old walker named Raymond Garraty and the teens, some good, some bad, some mysterious, in his orbit.”

Francis Lawrence (The Hunger Games: The Ballad of Songbirds & Snakes) is directing from a script by JT Mollner (Strange Darling). Lawrence is also producing the project through his company about:blank, alongside Roy Lee, Cameron MacConomy — his producing partner at about:blank —  as well as Steven Schneider.