The Chiefs will not stand in the way of Sonny Bill Williams pursuing his Olympic dream in 2016 after it was announced he would return to New Zealand rugby union in 2015.

Dual-code superstar Williams has signed a two-year deal with the New Zealand Rugby Union and the Chiefs Super15 side for 2015-16, it was announced on Friday.

Sonny Bill Williams is targeting the 2015 Rugby World Cup and the 2016 Olympics in Rio. Credit:Getty Images

Following next year’s NRL season with premiers the Sydney Roosters, Williams will move back to New Zealand to play for the Chiefs while chasing World Cup success with the All Blacks.

Chiefs coach Dave Rennie said he was delighted Williams was returning, but admitted Williams might play little for the Chiefs in 2016.