South Sydney have moved early to lock in breakthrough talent Tallis Duncan's future at the club.

The Wonnarua man put pen-to-paper on a three-year extension which will see him remain at the club until at least the end of 2030

Duncan proved to be one of the NRL's most exciting young talents in the Bunnies back row this year.

The 24-year-old has also shown his adaptability in the centres.

"I'm really happy to be staying at Souths. I love this club and this is my home," Duncan said.

"I've grown a lot since I first came to the Club and I'm grateful for everything Souths has given me. I'm looking forward to continuing that journey here.

"Putting on the Souths jersey means a lot to me, and I'm excited for what's ahead."

The Indigenous All Stars and Malta representative is in line to close in on 100 career games in 2027.

Duncan has made 73 appearances for the Rabbithos across the last three years, including scoring 12 tries in 22 games this year.

On nine occasions he started at centre.

"Tallis is one of the most exciting prospects in the NRL and we're delighted that he sees his future here at this Club," Souths recruitment head Mark Ellison said.

"He has shown that he has the desire, the willingness to work hard and the character to, not only play at the NRL level, but to excel at that level.

"He's had a taste of representative football but we can all see that he will play at the higher levels of the game.

"He comes from a wonderful family and we're excited to see the heights Tallis can reach in his career."

Duncan has twice run out in green and gold for the Prime Minister's XIII.

In other news, teammate David Fifita has been named captain of the Prime Minister's XIII for Saturday night's game against Papua New Guinea in Port Moresby.

Indigenous stars Ezra Mam. Josh Curren and Josh Kerr are amongst those Fiftia will lead this weekend.