Derbyshire have confirmed that pace bowler Will Davis and all-rounder Rob Hemmings have signed two-year contracts which will keep them at the club until at least the end of the 2018 season.
Both are graduates of Derbyshire's academy programme and made their County Championship debuts this season.
In three red-ball appearances this season, Davis took 14 wickets at an average of 30, including a haul of seven for 146 against Glamorgan.
The 20-year-old made his first-class debut against the touring Australians last summer and also featured this year against Kent and Worcestershire.
Hemmings' sole appearance to date came against Worcestershire while the 20-year-old has impressed enough while playing second XI cricket to earn a contract.
"Will and Rob are promising young players who have both impressed with the first team after making their debuts this summer," head coach John Sadler said.
"Will has bowled very well and produced some standout performances since making his way into the side in June. He’s bowled with good pace and is an exciting prospect.
"He and Rob will now both benefit greatly from another winter working full time with the first team as they continue their developments.
"We have a good group of talented young players who continue to learn and improve.
"We hope Will and Rob will be part of a crop of youngsters who will stand up and help contribute regularly to winning games for Derbyshire for years to come."
© Cricket World 2016