The 32-year-old has been a key figure in the heart of the New Zealand backline but a return to rugby league has been muted, with speculation suggesting a switch back to the NRL is on the cards.
However the Auckland-born star, who has also taken his hand to sevens rugby and boxing in the past, is adamant he has no plans to leave the 15-man form of the game and for the moment is just focused on the 2019 World Cup in Japan.
I love being a part of the @BluesRugbyTeam & @AllBlacks," Williams wrote on his Twitter account.
"God willing I'm a part of another successful World Cup Campaign next year in 2019. (sic)"