William Peltz is an American actor, who is best known for his roles in Unfriended, Manifest and Men, Women & Children.

Unfriended is a 2014 American screenlife supernatural horror film directed by Levan Gabriadze and produced by Timur Bekmambetov. Set on a computer screen, it is produced in the Screenlife format. The film stars Shelley Hennig, Moses Storm, Renee Olstead, Will Peltz, Jacob Wysocki, and Courtney Halverson as six high school students in a Skype conversation which is haunted by a student, played by Heather Sossaman, who was bullied by them and committed suicide. The film is told almost entirely through a screencast of a MacBook.