The duo were already contracted until the end of 2018 but this week agreed to improved terms in return for an additional year on their respective deals.
Fisher-Harris, 20, relocated from his native New Zealand to join the Panthers in 2013. He has represented the Junior Kiwis, was a member of the club’s premiership-winning NYC side last season and made his NRL debut in Round 1 this year.
“Despite the fact James has only played a handful of NRL matches, we are extremely confident in his potential and have invested in his long-term future with this deal,” Panthers Executive General Manager Rugby League Phil Gould AM said.
“I have no doubt this young man will be an integral part of our NRL team and a regular member of the New Zealand Test squad in years to come.
“He is just the latest example of a player graduating from our junior representative program into a premiership-winning NYC team and then into the NRL squad.”