Hong Kong (CNN) -- Sonny Bill Williams, the code-hopping rugby player who is perhaps the most talked-about athlete in Australasian sport, will make himself available to the New Zealand rugby league team in an attempt to win World Cups in two sports, says his manager. Williams' manager, Khoder Nasser, told CNN of his client's decision Tuesday, hours after New Zealand selectors named a squad without the 28-year-old star to contest the Rugby League World Cup, which will be held in England and Wales in October and November. Speculation about whether Williams would play in the World Cup has been a hot topic in rugby union and league since he helped propel his Sydney Roosters club to victory in Australia's National Rugby League grand final Sunday, amid talk it would be his last game in the sport.
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New Zealand's Sonny Bill Williams is a star in rugby union and rugby league
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Speculation has been heated as to whether he will play for his country in the rugby league World Cup
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His manager says he will chase the dream of winning World Cups in both rugby codes
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He won the rugby union World Cup with New Zealand's All Blacks in 2011
Since controversially leaving the 13-man game of rugby league for rugby union in 2008, walking out on his club mid-season, Williams has proved himself one of world sport's most versatile athletes -- and one of the most talked about public figures in @placeholder and New Zealand.