Sam Curran has joined his elder brother Tom in signing a new contract with Surrey.
The Oval-based outfit announced last Thursday that Tom had agreed terms until 2018 and now 17-year-old Sam has committed himself to the club for the same time period.
"I've had a great summer with Surrey and look forward to coming back next year as a full part of the professional squad," he told the club's official website.
"Between now and then I will be spending time on my A-Levels, as well as preparing with England and hopefully earning selection for the Under-19 World Cup."
Meanwhile, director of cricket Alec Stewart added: "I've already gone on record stating that he is the best English 17-year-old cricketer I've seen and I'm convinced he will have a very successful career with both Surrey and England."
The all-rounder took 22 wickets last season to help Surrey win the Division Two title.