Logan Lerman Sidney Hall Elle Fanning Melody Kyle Chandler The Searcher Michelle Monaghan Mrs. Hall Blake Jenner Brett Newport Nathan Lane Harold Margaret Qualley Alexandra Yahya Abdul-Mateen II Duane Tim Blake Nelson Johan Janina Gavankar Gina Darren Pettie Gerald Hall Alex Karpovsky Mr. Bauer Avery Whitted Henry Crowe Ariane Rinehart Darcy Sean Cullen Judge Newport Mercedes Herrero Mrs. Sennett Lora Martinez-Cunningham Hospital Administrator Sasha Hutchings Harold's Secretary Peter Francis James Dr. Baum Christine Devine News Anchor Fredrick Lopez Inmate Jazzy Kae Lab Partner Christina Brucato Jeanine Azumi Tsutsui Japanese Interviewer John Trejo Police Officer Zakiya Young Reporter 2 Jason Tottenham Reporter 3 Lee Garrett Officer 2 David Alan Basche Senator Dale Michael Drayer Max Richard Beal Town Cowboy (uncredited) Ludovic Coutaud Carnival Goer (uncredited) Cassandra Rochelle Fetters Reporter (uncredited) Fatima Ptacek Self (uncredited)