A top 10 prospect, Williams is one of the elite wing prospects in the 2013 class and he's off to a strong start in his junior season, averaging just over 21 points a game to go with double-figure rebounds.
North Carolina is the latest to his offer party, as they informed him Wednesday evening.
"I'd just like to say 'Congratulations on your offer from UNC,'" the Hampton (Va.) Phoebus standout said the Tar Heel head coach told him.
Roy Williams visited Phoebus on Monday to watch Troy Williams practice. The offer came two days later.
"I was overwhelmed," Troy Williams said of his reaction to the phone call. "I screamed inside."
UNC wasn't the only school to stop by Williams' high school recently. Kentucky dropped by last week and the Wildcats seem to be making push for the talented wing prospect.
"They've been keeping in touch," Williams said of the Wildcats, who sent assistant Orlando Antigua to check him out.
"They play my style of game, up-tempo, fast paced, get out and shoot threes and get to the rim. Coach Calipari lets them play. My uncle says it would be a good fit for me and all that but we will just wait and see."
Despite being in the middle of his season, Williams is hoping to visit a pair of Big East schools in the near future.
"Hopefully I make a trip out to Villanova," he said. "While I'm up there I'll see Georgetown's campus too."
Williams said the next step in his recruiting process is coming up with a top five.
"I should have a list by December 30th on my birthday," Williams said.