All-rounders Jonathan Clare and Wes Durston have both signed new contracts with Derbyshire.
Clare, 25, has made 1,139 runs at 27.11 and taken 92 wickets at 29.14 in his 34 first-class appearances for the county, including 484 runs and 30 wickets this season.
He has put pen-to-paper on a new three-year deal and head coach Karl Krikken said: "It's always great for the balance of the side to have a player who is capable of scoring centuries as well as performing as a front line bowler.
"Jon has all the talent and attributes to succeed both as a batsman and a bowler. He also brings an excellent attitude and work ethic to the camp. I'm delighted he will be here for at least the next three years."
Derbyshire have also revealed Durston has signed a new two-year contract.
The 30-year-old all-rounder joined the Falcons midway through the 2010 campaign and has impressed in recent weeks with some strong batting displays.
A superb 117 from 68 balls against Sussex was followed three weeks later with 111 from 59 balls in a Twenty20 match against Nottinghamshire. Such form has seen the former Somerset man become a fixture in the Derbyshire team in all forms of the game.
"I'm delighted to have been awarded another two years and excited to be a part of Derbyshire's future," said Durston, who has scored 1,403 runs and taken 17 wickets in all competitions this season.
"The club is assembling a talented young side and backing it to succeed and I buy into that philosophy 100 per cent."
Krikken added: "Wes is a talented three-dimensional cricketer and I'm delighted he has signed on for another two years.
"Maintaining a consistent level of performance in all three competitions is the benchmark for a professional cricketer and Wes had done that in 2011. That's why he has scored such a high volume of runs."