Season One
| Jovan Adepo ... Leroy Hanlon |
| Taylour Paige ... Charlotte Hanlon |
| James Remar ... General Shaw |
| Stephen Rider ... Hank Grogan |
| Matilda Lawler ... Marge |
| Amanda Christine ... Ronnie Grogan |
| Clara Stack ... Lilly Bainbridge |
| Blake Cameron James ... Will Hanlon |
| Arian S. Cartaya ... Rich |
| Miles Ekhardt ... Matty Clements |
| Mikkal Karim-Fidler ... Teddy Uris |
| Jack Molloy Legault ... Phil Malkin |
| Matilda Legault ... Susie Malkin |
| Chris Chalk ... Dick Hallorann |
| Madeleine Stowe ... |
| Bill Skarsgård ... Pennywise |