Tonga international back row Sione Kalamafoni has signed a new deal with Nottingham for the 2011-12 season.
The 22-year-old, who captained his country at last year's Pacific Nations Cup, joined the Green and Whites in August and has become a key player.
Director of rugby Glenn Delaney said: "He's made real progress. His potential is enormous and we're very pleased."
Kalamafoni added: "It's been a really good year and this is the right place to continue my development.
"The team spirit is brilliant and I'm looking forward to playing my part in the success of the side next year."