Tye Sheridan Wade Watts / Parzival Olivia Cooke Samantha Cook / Artemis Ben Mendelsohn Nolan Sorrento Lena Waithe Helen Harris / Aech T. J. Miller i-R0k (voice) Simon Pegg Ogden Morrow Mark Rylance James Halliday / Anorak Philip Zhao Zhou / Sho Win Morisaki Toshiro / Daito Hannah John-Kamen F'Nale Zandor Ralph Ineson Rick Susan Lynch Alice Clare Higgins Mrs. Gilmore Perdita Weeks Kira Letitia Wright Rebel Mckenna Grace Elementary Kid Lulu Wilson Elementary Kid Cara Pifko Leslee Vic Chao Goro Cara Theobold Tracer Isaac Andrews Young Halliday Joel MacCormack Sixer #6655 Kit Connor Reb Kid Kae Alexander Reb (Safe House) Jadah Marie Elementary Kid Laurence Spellman Lame Tattoo Guy (Reb) Violet McGraw Shopping Cart Kid (uncredited) Racheal Ofori Beautiful Woman (uncredited) Mark Stanley Old Zombie Woman