Young guns Matt Moylan and Bryce Cartwright will remain with Penrith for at least another five NRL seasons after both extended their contracts.
Fullback Moylan has added four years to his deal while five-eighth Cartwright added three, keeping both stars at the Panthers until at last the end of 2021.
"There is plenty of blue sky ahead for the Panthers and I'm confident we've put ourselves in a position to hopefully win a premiership within the next three years," Panthers Group CEO Brian Fletcher said.
Moylan, 25, had a breakout 2016, taking over the Panthers captaincy and earning a State of Origin debut with NSW.
He will also take part in the Prime Minister's XIII clash with a PNG outfit at Port Moresby on Saturday - a selection trial for the Four Nations squad to be named next month.
He and Cartwright helped Penrith make the semi-finals this season - and Moylan believed more success was to come.
"With the squad we have and the direction that we're heading, I'm sure we're building towards something special," he said in a statement.
"It's great to secure my future at the club and to know that I can be part of that journey."
Moylan has played 71 NRL games and scored 18 tries since his Panthers debut three years ago.
Cartwright, 21, also emerged as a force for Penrith this year.
He earned a NSW City Origin debut, was a Blues Origin development player and was named in the Kangaroos' Four Nations train on squad.
"This club has been my home for a long time now and I couldn't see myself playing anywhere else," said Cartwright, who has played 55 games since his 2014 debut.
His signing extends the Cartwright family's legacy at Penrith.
Cartwright's late grandfather Merv was a driving force behind the club's 1967 inception while his dad David and uncles Cliff, John and Michael all played for the Panthers.
