Trent Merrin has extended his contract with the Penrith Panthers until the end of the 2020 season the club announced on Wednesday.
"I am honoured and privileged to extend my stay at such a prestigious club," Merrin told PenrithPanthers.com.au.
"From just my short time being at the Panthers I know this is a club heading in the right direction.
"I consider myself extremely fortunate to be able to stay on this journey for another two years and witness the growth of the many talented young players coming through."
Merrin joined the Panthers on a three-year deal ahead the 2016 season.
The NSW and Australian representative forward has played 17 NRL games for the Panthers this year so far, averaging over 150 running metres and 30 tackles per game.