Teenage off-spinner Adam Riley has signed a contract extension with Kent, the terms of which are undisclosed.
The 19-year-old, who made his first-class debut against Northants in May, went on to take 14 wickets in six County Championship games this summer.
Batsman Chris Piesley, 19, joins Riley in signing an undisclosed extension to his deal.
Kent have also signed 18-year-old Fabian Cowdrey, the son of Chris and grandson of England legend Sir Colin.
Academy scholars Ivan Thomas and Benedict Kemp, who are both seam bowlers, have signed professional contracts.
Kent have also confirmed the departure of all-rounder James Goodman, who has decided to pursue a career outside cricket.
Chairman of cricket Graham Johnson said: "We are very fortunate to have a great number of talented young cricketers now coming through and the time has come for them to step up.
"Adam Riley has developed his bowling skills during the 2011 season and Chris Piesley has shown a great deal of promise.
"We now look to them to deliver regularly in first team cricket."