Alma Har'el Director, Producer Shia LaBeouf James Actor, Screenwriter Lucas Hedges Otis (22) Actor Noah Jupe Otis (12) Actor Byron Bowers Percy Actor Laura San Giacomo Dr. Moreno Actor FKA Twigs Shy Girl Actor Natasha Lyonne Mom Actor Maika Monroe Sandra Actor Clifton Collins Jr. Tom Actor Martin Starr Alec Actor Brian Kavanaugh-Jones Producer Daniela Taplin Lundberg Producer Anita Gou Producer Chris Leggett Producer Fred Berger Executive Producer Rafael Marmor Executive Producer Daniel Crown Executive Producer Bill Benenson Executive Producer Natasha Braier Cinematographer Dominic LaPerriere Film Editing Monica Salazar Film Editing Alex Somers Original Music Jc Molina Production Design Tatiana Van Sauter Set Decoration Natalie O'Brien Costume Design Chelsea Ellis Bloch Casting John Papsidera Casting Jennifer Venditti Casting