A young Castleford threequarter has made his switch to Newcastle permanent.
Kieran Gill has spent the full 2019 season on loan with the League 1 side and has agreed a one-year deal for 2020.
Gill is out of contract with the Tigers at the end of the season.
Castleford coach Daryl Powell said: “Kieran has been with us for a number of years now and he’s grown into being a First Team player and he’s played in Super League.
“He had an unfortunate injury with his knee but I think this is great opportunity to progress his career.
“He’s been up at Newcastle for this season and he’s done a great job for them and we would like to wish him all the best for his future career.”
Gill said: “I’m extremely excited to get the deal over the line, after a good loan period this year it was hard to not stay really.
“I’ve loved the last four years at Castleford and am thankful for the experience I’ve gained as a player and a person.
“Unfortunately injuries didn’t go my way but with Thunder I’ve found a great club with great ambitions and I’m sure it will continue to grow.”