Two key members of the All Blacks pack, number eight Kieran Read and lock Sam Whitelock, have re-signed with New Zealand until 2017.
Both deals which will see them play their rugby in New Zealand for another four years.
In what is a major contract announcement, the two players, who have both, again been in impressive form this year, have re-signed through until the end of the 2017 season.
They have also recommitted to their Crusaders team for the same period, a major boost for the Christchurch-based Super Rugby side.
"This is a significant re-signing for New Zealand Rugby with the tenure of the players' contracts covering two major rugby events - the Rugby World Cup in 2015 and the British and Irish Lions Tour to New Zealand in 2017, said New Zealand Rugby Chief Executive Steve Tew.
"Kieran and Sam have been outstanding in recent years and we are delighted to have them recommit to New Zealand.
"For them to commit to New Zealand for such a long time I think is also a credit to the environment that both the All Blacks and Crusaders have created which makes players want to stay."
27-year-old Read was named Man of the Match in the epic Rugby Championship-winning 38-27 Test win over South Africa in Johannesburg last weekend, a standout performance in what has been an imposing season for the number eight.
"The All Blacks and Crusaders have some exciting things coming up over the next few years and I'm really looking forward to being part of that" said Read.
"I love playing for both teams. The time is right to commit to New Zealand long-term, doing the right thing for my family played a big part and I'm incredibly happy with the decision.
"Obviously, in the long-term for the All Blacks there is the Rugby World Cup coming up in 2015 but we still have a lot to achieve in the short-term starting with the Test against Australia next weekend, the All Blacks' end of year tour to Japan and Europe and then next year's Super Rugby campaign," said Read.
At just 24 years of age, lock Samuel Whitelock has already amassed 47 Test caps since making his debut in 2010 and quickly cemented his place as one of the starting locks in the All Blacks and Crusaders.
"Playing for both teams is a dream come true for me and I am really enjoying my rugby at the moment," said Whitelock.
"I feel I am constantly learning and developing my game at the highest level and knowing that I will continue to do that in New Zealand over the next four years, playing alongside my mates, is an awesome feeling. There are some exciting times coming up for both teams.
"The fact that two world-class players in Kieran and Sam have re-signed for four more years is a huge positive for the All Blacks," said All Blacks head coach Steve Hansen.
"Not only are they part of the current success of the team, but it means we have a nucleus of experienced players to take the team into the future beyond 2015, which is fantastic. It's also great news for All Blacks and Crusaders fans, knowing that both players have committed to New Zealand rugby in the long-term."