Huddersfield's veteran second-rower Lee Gilmour has become Castleford's fourth major signing for 2013.
The club announced on Friday that the former Great Britain international will join the Tigers on a two-year deal.
Gilmour will line up alongside Jake Webster, Michael Shenton and Jamie Ellis at the Probiz Coliseum next season.
The 34-year-old signed a new two-year contract with Hiddersfield just 12 months ago but has been released by the Giants.
The move will see him reunited with coach Ian Millward, who nine years ago took him from Bradford to St Helens, where he enjoyed World Club Challenge, Super League and Challenge Cup success.
"Lee comes with a unique CV and we were in need of someone with that experience and knowledge," said Millward.
"He will not only be a valuable player, he'll also be a great mentor for our younger players. He's a very good communicator on and off the field and I'm delighted he'll be coming to Cas.
"People should dismiss his age as he's been very much injury-free throughout his career and has very good leg speed. He has the capabilities of emulating Steve Menzies well into his late 30s."
Huddersfield managing director Richard Thewlis said: "Lee has been one of our best signings for many a year at Huddersfield.
"But it would be wrong of us to stand in his way when a longer-term arrangement was available to him to continue playing at the highest level than he had currently guaranteed here.
"In addition the move eases some salary cap pressures and will enable us to look to strengthen the 2013 squad which Paul Anderson is putting together."