Jordie Barrett will stay put at the Hurricanes, signing on to remain with the Wellington-based Super Rugby side until the end of 2022.
Barrett, 24, has opted to stay with the Hurricanes, despite having the option in his New Zealand Rugby contract to switch to another side.
There was speculation that Barrett would head north to join older brother Beauden at the Blues.
Blues chief executive Andrew Hore told Newshub "never say never," when quizzed about a Barrett reunion on Wednesday.
The news will be a welcome relief for the Hurricanes, who've also secured the services of All Blacks TJ Perenara, Owen Franks and Dominic Bird for next year.
"Jordie is an incredibly influential part of the Hurricanes," coach Jason Holland says.
"Off the field he has developed to be one of our key leaders and on the field his skill set is plain for all to see,
"Most importantly he is a quality young man with great standards and values which rubs off on all of us in our environment."
Barrett has played 74 matches for the Hurricanes since his debut for the side in 2017.