Rangi Chase has signed a contract extension keeping him at Castleford for the next four seasons.
The much-admired 25-year-old stand-off was halfway through an existing four-year deal, due to expire in 2013.
But Cas hope that persuading the New Zealand-born former St George Illawarra youngster to extend his stay will stop speculation about a move elsewhere.
"I'm happy I've signed and got it out of the way. Cas is home for me now," said Chase, who first arrived in 2008.
"With Ian Millward and the new staff coming in, I'm confident the club is heading in the right direction.
"I've been here for three years and I wanted to repay the club for giving me an opportunity."
Chase ran in a personal best of 12 tries in 25 Super League appearances last season and has a tally of 29 in 77 appearances at Cas.
Cas chief executive Richard Wright said: "We are absolutely delighted that Rangi sees his long-term future here.
"We have beaten off global interest for his services from both codes of rugby and believe this to be a huge statement of our intentions.
"We have signed the best all-round player in Super League - a player who has proven his ability both domestically and on the world stage.
"He is a player that the board of directors are determined to build a successful team around and believe, at 25 years of age, he is still to reach his peak.
"In new coach Ian Millward, we're extremely confident we have the coach to bring the very best out of him in black and amber."