England hooker Jamie George has signed a new "multi-year" contract with Premiership champions Saracens.
The 25-year-old, who has won three international caps, came through the north London club's academy and made his first-team debut in November 2009.
"I've loved every second I've spent at the club over these last six seasons," he said.
"I really buy into what we are doing. It's such a special environment and you constantly feel you are developing."
George made his debut for England in their second World Cup warm-up match against France in August and played in the tournament proper against Uruguay.
"We are all very excited to see Jamie continue to excel for both club and country over the next few years," Saracens director of rugby Mark McCall said.
"Jamie served a long apprenticeship coming through the ranks, and his patience is beginning to bear fruit judging by his performances over the last 18 months."