Batsman Wayne Madsen and pace bowler Mark Footitt have signed new two-year contracts with Derbyshire.
Promising opener Madsen scored 1,403 runs in his second season for the club last year, including 170 on his debut.
Former England U19 representative Footitt, 24, took 33 wickets in all competitions.
Derbyshire head of cricket John Morris said: "I am delighted to secure the services of two cricketers who could prove to be prized assets for the next two years."
"In Mark Footitt we have a bowler capable of genuine pace, who took promising strides forward in 2010. He is aiming to continue that development over the next two years into a front line first-class bowler.
"Wayne Madsen has brought great professionalism and an exemplary attitude to the squad as well as maintaining the happy habit of scoring centuries.
"Both players are now working hard during the winter to attain the peak of physical fitness before no doubt testing each other out in the nets ahead of the 2011 season."