All Blacks star and Crusaders captain Scott Barrett re-signed with New Zealand Rugby (NZR) and the Super Rugby side until 2023.
Barrett's recommitment to NZR runs through to the 2023 Rugby World Cup, it was announced on Tuesday.
The 26-year-old lock, who is one of three brothers in the All Blacks squad alongside Beauden and Jordie Barrett, has made 36 international appearances since debuting for New Zealand in 2016.
All Blacks head coach Ian Foster said: "This is massive news for New Zealand Rugby and the All Blacks.
"Scott has already made an outstanding contribution to the team since making his debut back in 2016 and we know the best is yet to come. It's really exciting for the future having him re-signed."
Barrett and the Crusaders are preparing for the start of next month's Super Rugby Aotearoa.
The Crusaders, Blues, Chiefs, Hurricanes and Highlanders will begin a season of their own, starting June 13, amid the coronavirus pandemic.
New Zealand's five Super Rugby teams will play each other home and away over 10 weeks, beginning with a clash between the Highlanders and Chiefs behind closed doors in Dunedin on June 13.