The Newcastle Knights' Ponga and Parramatta Eels' Moses are yet to represent Australia, but are set to play their parts in Sydney on October 18-19.
Moses' Eels team-mate Clint Gutherson and the Brisbane Broncos' David Fifita are also part of the squad.
Australia head coach Mal Meninga is excited by the players he has at his disposal for the tournament.
Congrats to Eels Clint Gutherson, Mitch Moses and Nathan Brown who have been named in Australia’s Nines squad!
— Parramatta Eels (@TheParraEels) October 7, 2019
"This is an exciting squad of players and I can't wait to see what they can do in this format," he said.
"We have some experienced Kangaroos representatives but we also have some players who have never represented Australia before.
"It will be fantastic to see all these players in the green and gold and on this stage.
"Nines is a fantastic innovation and this group of players have been picked with this form of the game in mind, but also with a view to seeing what a number of them can do in an Australian jumper."
Australia will face New Zealand, the United States and Papua New Guinea in Pool A.
Australia Nines squad:
Josh Addo-Carr, Jai Arrow, AJ Brimson, Nathan Brown, Kyle Feldt, David Fifita, Tyson Frizell, Reuben Garrick, Wade Graham, Clint Gutherson, Ben Hunt, Mitchell Moses, Ryan Papenhuyzen, Kalyn Ponga, Curtis Scott, Cody Walker.
Photo Getty Images. Caption: Newcastle Knights star Kalyn Ponga