Williams, who visited the Champaign campus on Sunday, made the announcement on Twitter.
Proud to announce that I will be committing to the University of Illinois 🏀🔶🔷😈😎 pic.twitter.com/VE0BmPrUwU
— Monte (@DAWilliams14) February 29, 2016
Williams, a 6-foot-3 guard from Manual High School (Illinois), is ranked No. 39 in the ESPN 60 for the 2017 class. He is the No. 8 shooting guard in the country.
Williams is the son of former Illinois guard Frank Williams, who played for the Fighting Illini from 1999-2002. He helped Illinois -- coached by Lon Kruger and then Bill Self -- to three straight NCAA tournament appearances, including an Elite Eight run in 2001.
Illinois coach John Groce now has two pledges in the 2017 class, with Williams joining in-state shooting guard Javon Pickett. The 2017 cycle is a key recruiting class for Groce, who has yet to finish above .500 in the Big Ten since he took over at Illinois in 2012.
The biggest target on the Illini's board in the junior class is four-star big man Jeremiah Tilmon, a 6-foot-9 center from East St. Louis, Illinois, who plays at La Lumiere School (Indiana). Illinois is considered a front-runner for Tilmon.