DeMarcus Cousins didn't let a torn ACL hold him back on the biggest day of his life ... so says Matt Barnes, who tells TMZ Sports the NBA superstar was dancing and in great spirits at his wedding over the weekend!!!
The 29-year-old Lakers center married his longtime girlfriend Morgan Lang in Atlanta on Saturday -- just 2 weeks after seriously injuring his left knee in a Vegas training sesh.
The event looked like NBA All Star Weekend with huge stars like Barnes, Anthony Davis, Draymond Green, Andre Iguodala and more in attendance.