Justen Sanders was born and raised in Flushing, Michigan. His mother's name is Kelly Sanders. His father, Jack Sanders, worked in advertising at a local business they both owned. He has a younger brother, Josh(Joshua)and younger sister Ashleigh. At Flushing High School, Sanders was involved in sports, debating, student government and school musicals. Sanders attended the University of Michigan, where he majored in pre law with a focus on advertising. He occasionally acted in local theater groups. He left college one year short of graduating. Before he became an actor, Sanders supported himself by working as a paramedic, security at a retail store, and briefly worked as a EKG Technician.