Cowboys teenage sensation Kalyn Ponga has signed a lucrative deal with the Newcastle Knights.

Kalyn Ponga signs with Knights

The Newcastle Knights have signed Cowboys teen star Kalyn Ponga on a four-year deal, starting in 2018.

The 18-year-old fullback, who played two NRL matches during the 2016 finals series, was a member of the 2016 NYC Team of the Year and is rated one of the most promising young players in rugby league.

"There is no doubt Kalyn is a very talented and exciting young player and his signing is definitely a coup for the club," Knights coach Nathan Brown said. 

"We look forward to further developing his talent and welcoming his family to Newcastle."

Knights CEO Matt Gidley said Ponga remained contracted to the Cowboys for the 2017 season.

"As it stands, we are excited about Kalyn joining us in 2018," Gidley added.

"Should the Cowboys decide to release Kalyn before the conclusion of his contract, we would certainly welcome him to the club at an earlier date."

Read more at newcastleknights.com.au