Sam Levinson Director, Screenwriter Odessa Young Lily Actor Suki Waterhouse Sarah Actor Hari Nef Bex Actor Abra Em Actor Bill Skarsgård Mark Actor Bella Thorne Reagan Actor Joel McHale Nick Actor Anika Noni Rose Nance Actor Colman Domingo Principal Turrell Actor Maude Apatow Grace Actor Cody Christian Johnny Actor Kathryn Erbe Rebecca Colson Actor Danny Ramirez Diamond Actor Kelvin Harrison Jr. Mason Actor Noah Galvin Marty Actor Joe Chrest Lawrence Actor J.D. Evermore Chief Patterson Actor Lukas Gage Eric Actor David S. Goyer Producer Kevin Turen Producer Anita Gou Producer Matthew J. Malek Producer Manu Gargi Producer Aaron L. Gilbert Producer Jason Cloth Executive Producer Steven Thibault Executive Producer Andrew Pollack Executive Producer Mike Novogratz Executive Producer David Gendron Executive Producer Ali Jazayeri Executive Producer J.E. Moore Executive Producer Will Greenfield Executive Producer Marcell Rév Cinematographer Ron Patane Film Editing Ian Hultquist Original Music Michael Grasley Production Design Rachel Dainer-Best Costume Design Mary Vernieu Casting Jessica Kelly Casting