Former Australia rugby league international Timana Tahu will switch to the union code for the 2008 season.
Tahu has five international caps
Tahu will see out his contract with Parramatta before joining the NSW Waratahs on a four-year deal.
The 26-year-old centre has five caps for Australia and has played in 11 State of Origin matches.
His move is the first high-profile conversion from league to union since Canberra full-back Clinton Schifcofske defected to Queensland last year.
Australia winger Lote Tuqiri, who made a similar switch from league at the end of 2002, said he expected Tahu to be fast-tracked into the international set-up.
He's got size, agility and speed
Waratahs coach Ewen McKenzie
"I reckon he'll play for the Wallabies in his first year," said Tuqiri, who has played 50 Tests for the Wallabies since switching from league.
"He's carved up defences in all levels of rugby league and I reckon he'll do that when he comes across."
And Waratahs coach Ewen McKenzie said he was excited about Tahu's potential.
"He's got a phenomenal try-scoring record in rugby league, he just knows how to score tries - he's got size, he's got agility, he's got speed," said McKenzie.
Tahu has been pencilled in to play at outside centre for the Waratahs.
"He and I have spoken about number 13 and I think the centres is definitely where he wants to play and that's where I'm looking to play him, added McKenzie.