New Zealand duo Ngani Laumape and Vaea Fifita are among four players to have signed new Hurricanes contracts.
The Super Rugby champions have tied down former NRL player Laumape until 2019, while Fifita has committed to the club until 2020.
Matt Proctor has also agreed terms to stay in Wellington for the next two years, while Geoff Cridge has signed on for one year.
"Coming back to rugby union from rugby league in 2016 was a massive challenge, but the Hurricanes coaches have made the transition a lot easier and I've loved every minute," said wing Laumape, who made his All Blacks debut in the second Test against the British and Irish Lions.
"The Hurricanes environment has really helped me develop my game and I can't wait to continue that progress over the next two seasons."
Fifita has one cap to his name, which came against Samoa last month, but was an unused member of the squad for the Lions tour.
He did, however, score a try for for his club side against Warren Gatland's men.
The 25-year-old said: "I've learned so much since joining the Hurricanes in 2015 and I feel very lucky to have been part of the club over the past three years.
"Representing the All Blacks was a dream come true and I'm thankful to the Hurricanes coaching staff for helping me realise my potential.
"I know I still have a long way to go and the Hurricanes is the right place for me to continue my career."