The dual international Sonny Bill Williams will box professionally for the seventh time next month.
The current All Black and former Kiwis star will fight the experienced American Chauncy Welliver, who's a former New Zealand heavyweight champion.
The bout is the headline act at the inaugural Footy Show Fight Night in Sydney on January 31st.
New South Wales State of Origin captain Paul Gallen is on the undercard, as is Wallabies playmaker Quade Cooper, and the All Black flanker Liam Messam.
It will be Williams' first fight since beating South African Frans Botha in a controversial 10-round encounter in February last year.
The 29-year-old's unbeaten in six heavyweight contests since debuting in 2009.
Williams, who returned to rugby after a successful two-year stint with the Sydney Roosters in the NRL, is juggling his preparation for the fight with pre-season training with the Chiefs ahead of their 2015 Super Rugby opener in February.