Sonny Bill Williams has committed to the All Blacks and New Zealand Rugby through to the end of 2019.
But he has opted for a change of Super Rugby franchise, and will move from the Chiefs to the Blues from the start of next season.
Williams will again link with Tana Umaga in Auckland, having previously played under the Blues coach at French club Toulon and New Zealand provincial side Counties Manukau.
"Sonny is a marquee international player, and first and foremost he is here to play," Umaga said. "His experience and expertise will be a major asset to a young backline.
"Off the field he brings leadership and a thoroughly professional attitude and approach that will hugely benefit our club and our players."
Williams had been the target of NRL clubs and cashed-up European sides, but the desire to cement his place in All Blacks folklore with a third World Cup triumph proved too strong to ignore.
With Ma'a Nonu having departed for Toulon, Williams also now has the chance to nail down the No.12 jersey rather than be a stopgap solution like he has been at Test level to date.
"It's great news for New Zealand Rugby having Sonny available for the next three years," All Blacks coach Steve Hansen said.
"He is an extraordinarily gifted athlete and thoroughly professional in everything he does. His recommitment will bring a stability to the midfield and will allow us to build a world-class centre combination. Sonny's professionalism, both on and off the field, will not only be an asset to his fellow midfielders, but also the rest of the team.
"Sonny is part of the new leadership group in the All Blacks and it's good to know that he'll be contributing in that role over the next three years.
"He's currently one of the best players in the world. His understanding of the game is now allowing him to play instinctively and I believe he'll only get better and better. He could end up being one of the greats of our game."
Williams has spent this season with the New Zealand Sevens and is expected to be included in Gordon Tietjens' squad for the Rio Olympics.
SBW commits to All Blacks, jumps ship to Blues