Marvin Gaye Williams, Jr. (born June 19, 1986 in Bremerton, Washington) is an American professional basketball player. He currently is playing for the Atlanta Hawks of the National Basketball Association and is listed at 6' 9" and 230 pounds. Williams played college basketball under coach Roy Williams at the University of North Carolina.

Marvin Williams was a standout for Bremerton High School in Bremerton, Washington. As a senior, he averaged 28.7 points, 15.5 rebounds, 5.0 blocks, and 5.0 assists per game. Williams earned numerous awards, including being named a McDonald's All-American, a Parade All-American, and all-state.

After being offered scholarships by the University of Washington, the University of Arizona, and the University of Kansas, Williams accepted a basketball scholarship at the University of North Carolina at Chapel Hill.