Swansea have completed their move for Barnsley defender Alfie Mawson.
The 22-year-old has signed a four-year contract after moving from South Yorkshire for an undisclosed fee.
The two clubs reached an agreement on Friday but the deal had remained subject to personal terms being finalised.
He is now the latest in a series of young Barnsley defenders to progress to the Premier League, following Manchester City’s John Stones and Everton teenager Mason Holgate.
Barnsley have moved swiftly to cover for Mawson’s exit, bringing in Middlesbrough’s Adam Jackson and Newcaslte forward Adam Armstrong, both on loan.