Greg Inglis has become the first superstar to take advantage of the new NRL broadcast deal by signing a lucrative new five-year contract with South Sydney.

Inglis, who joined Souths at the start of the 2011 season, has committed his future to the club until the end of the 2017, having agreed a deal that's believed to make him the highest-paid player in the game.

The 25-year-old enjoyed his best season with the club and helped Michael Maguire's side to reach the finals for the first time in five years.

"I couldn't be happier to have sorted out my future for the long term, and to be part of the Rabbitohs plans for the next five years or more is very special for me," Inglis said.

"I came here at the start of 2011 and have really felt at home.

"All of the players, coaches, staff and members have helped me make the transition to Sydney, as well as the change to my new position at fullback, and hopefully I can repay everyone through my performances on and off the field over the next five years."

Coach Maguire says the re-signing of Inglis is a massive boost.

"Greggy is obviously a very talented player and he's really matured and become a leader at South Sydney," Maguire said.

"He's capable of some extraordinary things on the field and he has an extraordinary effect on people off the field too.

"He's told me that he's fully committed to the club, the team and the South Sydney district and you can see that by the efforts he puts in on and off the field."