The Mavs have released shooting guard Ryan Broekhoff, who shot 40.3% from 3-point range in 59 games over two seasons, to create a roster spot for Kidd-Gilchrist.
Kidd-Gilchrist, the No. 2 overall pick of the 2012 draft, fell out of the Hornets' rotation this season before receiving a buyout last week.
At 6-foot-6, 232 pounds, Kidd-Gilchrist has earned a reputation as a strong wing defender. He will provide the Mavs a physical option to guard powerful, elite scorers such as James Harden, LeBron James and Kawhi Leonard in the Western Conference.
Kidd-Gilchrist's jump shot is his biggest flaw, as he is a career 28% 3-point shooter. He averaged 8.6 points and 5.5 rebounds in 433 games for Charlotte.