Grant Dean Williams was born in 1998 in Houston. He is the son of Gilbert and Teresa Williams. His mother, Teresa, is an electrical engineer for NASA in Houston. Grant attended and played high school basketball at Providence Day School in Charlotte. He was one of only four players ever to be named The Charlotte Observer's Player of the Year in back-to-back years (2015 and 2016). During his senior season (2015-16), Williams averaged 15.8 points, 10.1 rebounds, 4.0 assists, 3.0 blocks and 0.5 steals per game en route to Associated Press All-State honors. He also led Providence Day to the 2016 North Carolina Independent Schools Athletic Association 3A state championship. Shortly after the conclusion of his senior season, he performed a role in Providence Day's production of the musical "Anything Goes". After high school, Williams chose to attend the University of Tennessee over Harvard, Princeton and Yale. Grant has joked that his mom was upset he passed over Harvard and that she didn't talk to him for two months. At Tennessee, the power forward fulfilled all the course work for his academic major, Supply Chain Management, by the end of his junior year. In his first December with Boston, Williams' gifted each Celtic team employee with a custom jarred candle which read "Appreciate All You Do For Us, Let's Have a Great Year." During their rookie season together, new Celtics Grant Williams and Tacko Fall hosted the "Grant & Tacko Show" podcast in a partnership with The Athletic. Fans can follow the thoughtful and polite Williams on Twitter @Grant2Will. In three years (2016-19) at the University of Tennessee, Grant Williams earned his degree in Supply Chain Management and started 101 of 104 basketball games for the Volunteers. After averaging 12.6 points, 5.9 rebounds and 1.9 blocks over 25.4 minutes his freshman season, he was named to the 2016-17 SEC All-Freshman team. As a sophomore, he was named 2018 SEC Player of the Year, led the Vols in scoring (15.2 ppg), and was second in blocks (44) and rebounding (6.0 rpg). He joined Naismith Memorial Basketball Hall of Famer Bernard King as the only Vols ever to earn SEC Play of the Year distinction as underclassmen. After his third and final season, Williams was the first player to win SEC Player of the Year in back-to-back years since 1995. He also joined Bernard King and Dale Ellis as the only Vols to ever be named consensus first-team All-Americans by the NCAA. His 23-of-23 performance from the free-throw line at Vanderbilt (Jan. 23, 2019) stands as the most free throws made without a miss by any player in Division I in the last 60 years and was second all-time.