The footy legend also played seven State of Origin matches for Queensland.
Green finished his NRL career at the Broncos in 2004 before turning his hand to coaching. His greatest achievement was leading the Cowboys to their maiden premiership in 2015, when they defeated Brisbane in one of the most thrilling grand finals in history.
Green also coached Queensland's State of Origin team in 2021, when they lost the series to NSW 2-1.
After seven years in charge of North Queensland, he was replaced by Todd Payten at the end of 2020. Green's name had been thrown about as a potential mentor for a number of NRL sides who have parted ways with their coaches this year, including the Wests Tigers, Bulldogs and Warriors.
Tributes have come pouring in for Green from footy fans and clubs.
Former Penrith and Cronulla star Martin Lang tweeted: "This is so sad. Paul was a close mate, we moved to Sydney together in 1993 … the beginning of an outstanding NRL playing/coaching career. My sincere condolences to Paul's wife, children and his dear mum and dad. Rest In Peace mate."
According to reports, Green was also offered a gig as assistant coach to Wayne Bennett at the Dolphins, who will enter the NRL competition next year.
