Yorkshire have announced the signing of England's limited-overs all-rounder David Willey from Northamptonshire on a three-year contract.
Willey has been a stand-out performer in the shorter formats for Northants in recent years and created shockwaves last week by blasting the quickest hundred of this year's NatWest T20 Blast, and the joint eighth fastest of all-time, off just 40 balls.
But he will leave Wantage Road at the end of the current campaign to link up with reigning county champions Yorkshire.
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"I am really excited to be joining Yorkshire and being part of a progressive side," said the 25-year-old.
The son of former England all-rounder Peter had been linked with a host of counties once it emerged he was prepared to leave Northants, with whom he made his first-class debut in 2009.
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He came of age four years later by playing a starring role in their Twenty20 triumph, following up a daring 27-ball 60 with bowling figures of four for nine - including a hat-trick - against Surrey in the final.
Willey's career has continued to prosper and his form was rewarded with an England debut in the washed out one-day international against Ireland in May this year.
He has earned three more ODI caps as well as a Twenty20 international appearance, while he bolstered his standing as one of the hottest limited-overs players with his knock against Sussex at Hove recently.
His maiden T20 hundred included 10 sixes - with 34 runs coming off a single Michael Yardy over - to send Northants through to their second Finals Day in three years.
Willey will now be hoping to boost his first-class credentials at Yorkshire, where he will be seen as the heir apparent to fellow left-arm seamer Ryan Sidebottom.
"I'm looking forward to working with (coach) Jason Gillespie and the rest of the Yorkshire lads," said Willey.
"This has been a tough decision to make because of my personal attachment to the County Ground. I came here many, many times as a boy and dreamed of playing for Northants.
"I will always be grateful for the years of coaching and mentoring that I have received which gave me the best start to my career.
"However, I feel that the time is right to move on, to experience a new approach to training and to broaden my cricket education.
"Yorkshire gives me the best opportunity to challenge myself working alongside some of the best players in the country."