Vanderbilt was born April 3, 1999 in Houston, Texas to parents Gwen and Robert. He has five siblings, and his sister Jene played college basketball at UTSA. Vanderbilt attended high school at Victory Prep in Houston, where he was a standout track athlete in addition to basketball. He won district titles in both the 100 and 200 meters. Prior to his junior year, Vanderbilt helped lead Team USA to a gold medal in the 2015 FIBA Americas Under-16 Championship. As a senior, Vanderbilt averaged 28.5 points, 13.4 rebounds and 8.8 assists for Victory Prep. He was a consensus five-star recruit and participated in the McDonald's All-American game, the Nike Hoops Summit and the Jordan Brand Classic. You can follow Vanderbilt on Twitter @JVando or on Instagram @jvando_.