Louis Tyrone Williams is an American former professional basketball player. He was drafted directly out of high school by the Philadelphia 76ers with the 45th overall pick in the 2005 NBA draft. He is a 3-time NBA Sixth Man of the Year. As of March 2019, he is the NBA's career leader in points off the bench, and has played the most career games off the bench, surpassing Dell Curry's record in February 2022.

The NBA high school draftees are players who have been drafted to the National Basketball Association (NBA) straight out of high school. The process of jumping directly from high school basketball to the professional level is also known as going prep-to-pro. Since 2006, the practice of drafting high school players has been prohibited by the new collective bargaining agreement, which requires that players who enter the draft be 19 years of age or older and at least one year removed from high school.