Widnes have signed Castleford's Samoa international three-quarter Willie Isa on a two-year contract for their return to Super League in 2012.
The 22-year-old, formerly of Penrith and Melbourne, has played nine times for Cas in an injury-hit campaign.
Isa's arrival, subject to receiving a visa, will make him the ninth close season signing at the Stobart Stadium.
"He's a classy outside back, a position all clubs are finding extremely hard to source," said Widnes coach Denis Betts.
"As an added bonus, he has an X-factor about him as both a player and person."