The eight-time NBA champion and Basketball Hall of Famer died on April 25. He was 79.
Havlicek's death was confirmed in a statement by the Boston Celtics, the team he played with for 16 seasons.
"John Havlicek is one of the most accomplished players in Boston Celtics history ... He was a great champion both on the court and in the community," the statement began.
Havlicek remains the Celtics' highest scoring member with 26,395 points across his career. He was also a 13-time NBA All-Star, and upon his retirement in 1978, the Celtics immediately retired his number 17 jersey with him.
While the NBA legend had been suffering from Parkinson's disease, the statement did not confirm his exact cause of death.