All Blacks winger Rieko Ioane has signed a new four-year deal with New Zealand Rugby today.
The 21-year-old was named World Rugby's breakout player of the year in 2017 and has been outstanding for the national side since making his debut in 2016.
Brother Akira also signed a new three-year deal with NZ Rugby.
Rieko has scored 18 tries in 18 Tests, including a double against South Africa in Wellington last week in the All Blacks' 36-34 loss.
All Blacks coach Steve Hansen said it was "fantastic news for New Zealand Rugby. Rieko is a young player with undoubted talent who has already achieved wonderful things on the international stage."
Rieko said he felt "incredibly privileged to get the opportunity to play my rugby here for another four years." He said playing at a World Cup was "a huge motivator for me."
All Blacks assistant coach Ian Foster said last month that Rieko is key player for the future.
"He's a vital component of our plan going forward," said Foster.
"I can't speak highly enough about him. He came in with a bit of a swagger and he has learned about the All Blacks.
"What I like is he has got real maturity about him, he hasn't got ahead of himself, and he quietly goes about his work."
The new deal will see Rieko stay in New Zealand until the end of 2022 with Akira signed until the end of 2021.
"He's learning how to prepare better and better every test match, and when he goes out and plays he seems to enjoy doing what he's done since he was a kid. As long as we can keep him in that mode it's really exciting."