Australian NBA star Josh Green has been rewarded with a hefty $64 million extension following an impressive season with the Dallas Mavericks.

Green, 22, signed a three-year extension that will tie him down to the Mavericks through the 2026-27 season.

The Sydney native, who was drafted 18th overall in the 2020 NBA Draft, is the 12th player from his class to sign a rookie extension deal.

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Green averaged a career-high in points (9.1) and rebounds per game (3.0) in 60 games last season, cementing himself as one of the league’s most efficient players on offence.

The Aussie was just one of three players to shoot over 50 per cent from the field and over 40 per cent from three-point range, joining star duo Kevin Durant and Kawhi Leonard.

Green joins star teammate Luka Doncic as the only Dallas player to sign a rookie extension with the franchise since Devin Harris did so in 2007.

“I know I want to be here. I’m going to work as if I’m going to be here for a long time. I want to be able to win in Dallas,” Green, who turns 24 next month, said at the Mavericks’ media day earlier this month.

“I’m going to be in Dallas. Whatever their decision, it is their decision. I have the same goal every single day, and that’s just to be the best teammate or the best player I can be for the team.”

Green was one of the few shining lights in the Boomers’ disappointing FIBA World Cup campaign in August.

“I just saw it when we came back from camp. The guy that I met for the first time a year ago, and the player that came into camp the first couple days, I told him, I said: ‘I was so proud of the development’,” Boomers coach Brian Goorjian said of Green’s development.

“Full credit to the Dallas Mavericks and what they’re doing with their youth because he came in just a much better basketball player than in Tokyo the last time.”

Green and the Mavericks will open their regular season when they face the San Antonio Spurs on Thursday morning AEDT.