Sky Sports sources understand that Davide Santon has completed his move to Newcastle and has penned a five-year contract.
The Italian full-back has been strongly linked with the Magpies over recent days, with Inter Milan prepared to discuss a deal.
The 20-year-old arrived in England on Tuesday ahead of undergoing a medical with the Magpies.
It is understood that he has been given the all clear and has put the finishing touches to a move.
Santon will be hoping to breathe new life into his career on Tyneside, with the last couple of seasons having seen him stagnate.
He is capable of operating on either side of the back four and Alan Pardew may opt to use him as a replacement for Jose Enrique at left-back.