Northants were eager to keep White
Nottinghamshire have completed the signing of Northants spinner Graeme White on a two-year contract.
The 22-year-old left-armer turned down a new deal to stay with Northants - the club he joined as a 13-year-old.
Director of cricket Mick Newell said: "We wanted to get a young spinner on board and Graeme is ideal. He is a good batter and useful fielder."
Meanwhile, 20-year-old opening batsman Alex Hales has also signed a new three-year contract.
Newell added: "We are making a concerted effort to introduce younger players into the team and Alex has shown that he is becoming a very capable opening batsman in first class cricket.
It is disappointing that he feels he has to leave us to further his career
Northants head coach David Capel
"I want to put my faith in him at the start of next season because he has demonstrated that he is beginning to realise his potential.
"His 150 in the Pro40 was the outstanding innings of the season and hopefully he can build on the start that he has made."
And, Newell was equally excited by White's move to Trent Bridge.
"Graeme has continued to improve and we've kept a close eye on that," Newell added. "We're confident that he is ready for regular first-team cricket."
Northants head coach David Capel told his club's website: "It is disappointing that he feels he has to leave us to further his career.
"Graeme featured prominently in our plans, however Notts have offered him similar playing opportunities."
Notts were eager to sign a spinner to cover for England regular Graeme Swann, who missed most off last season because of international commitments.
Jason Brown, who was signed in the summer following his release by Northants, failed to make an impact.