Peterborough United have completed the signing of Stevenage midfielder George Boyd for a Conference record transfer fee of £260,000.
The 21-year-old agreed the move at the end of last month and was paraded in front of Posh fans during Saturday's FA Cup 1-1 draw against Plymouth.
"George is highly rated and has been extremely sought-after," Peterborough director of football Barry Fry said.
"We're delighted to secure his services. He's an exciting prospect."
Boyd, who has scored eight goals so far this season, has made more than 100 first-team starts for Stevenage, and has been attracting attention from Football League clubs since July 2005.
"We can't keep denying a youngster his chance of playing in the League"
Stevenage chairman Phil Wallace, who turned down an offer from the same club before Christmas, said he had little choice but to let Boyd leave once Posh had agreed to pay the asking price.
"We promised George that if the right offer came in and he wanted to go we wouldn't stand in his way," he told Stevenage's official website.
"Peterborough have made George a fantastic offer which he wants to accept and they've met our valuation so we have to keep our promise, and allow him to move on and test himself against League opposition.
"We can't keep denying a youngster his chance of playing in the League or nobody would ever sign for us again."