"Yes they have," Flower Mound (Tex.) Marcus coach Kenny Borens confirmed, when asked about the offer.
"Coach Williams has been down here four times and on the last time, which was about a month ago, he talked to Marcus and called his mom and they made the official offer then."
Smart has had the entire Big 12 recruiting him for quite some time. But he's managed to come away with a handful of favorites.
"It's been Hollywood for him because everybody but anybody has been around," Borens said. "He's a special kid. He doesn't think it's a big deal. He's very humble with it all."
"His short list is North Carolina, Texas, Oklahoma and Kansas. That's his short list right now."
Borens said his star guard's recruitment has taken off.
"This past year it's heated up more," he said. "It's always been quite a few (schools interested). But this past year North Carolina started expressing their interest and following him closely and making that offer a month ago. There's been more interest this year."
"I do believe that they are going to go unofficially before the summer is out to all of the top four," he added about campus visits.
A tough, scrappy player, Smart is a do-it-all guard that is known for his leadership, strength and winning attributes.
"He's a winner," Borens said. "That's just what Marcus Smart is."
Although he's listed as a shooting guard in Scout.com's class of 2012 rankings, Smart is a prospect that is capable of playing a variety of positions.
"For us at the high school level he can do whatever he wants," Borens said. "He's a big bodied, strong kid. He's just a versatile player. He plays the one, two, three, four and five for us."
"He's so strong and he has the ball handling skills where he can play the one," he added. "He's just a versatile player. At the next level he's probably going to play (in the backcourt) more, but that's real deceiving because he'll come up with every rebound."
Smart was named the state's Gatorade Player of the Year as a junior, after averaging 14 points, 8.7 rebounds, 4.8 assists and 2.5 steals per game, leading Marcus High School to a 39-1 record and 5-A state title, during in which Smart was named finals MVP.