Markelle Fultz, you have company.

Duke Blue Devils first-year star Jayson Tatum has officially declared for this year’s NBA draft — and some predict he could unseat favorite Fultz of Washington as the no. 1 selection.

The forward becomes just the 10th Duke freshman to declare for the draft, but eighth since 2011, and is widely expected to be selected in the top five.

The St. Louis native averaged 16.8 points and 7.3 rebounds per game this season, becoming the third player under coach Mike Krzyzewski at Duke to average 16-plus points and seven-plus rebounds as a freshman (Jabari Parker and Jahlil Okafor are the others).

“I have absolutely loved coaching Jayson Tatum,” Duke head coach Mike Krzyzewski said upon Tatum’s announcement. “His skill set and work ethic will make him a star in the NBA. Whichever team selects him will be getting a humble, thoughtful and talented young man whom we are proud to call a member of the Duke Basketball brotherhood.”

Tatum’s freshman season ended when the Blue Devils were upended by South Carolina in the second round of the DI tournament. Tatum had 15 points, three rebounds and an assist in the loss.