Huddersfield Town have signed Manchester United midfielder Oliver Norwood on a three-year contract.
Barnsley were optimistic of signing the 21-year-old, but he has instead chosen to move to the Galpharm Stadium.
"He is a brilliant footballer and someone that I believe will do well," Simon Grayson told the club website.
The Northern Ireland international came through the youth system at Old Trafford but failed to make a first-team appearance.
"He is an excellent passer of the ball from the centre of the park and shows good composure on it, he will add a different dimension to our midfield," Grayson added.
"He is a young, full international who is full of desire and has excellent potential.
"Oliver turned down a number of other clubs to be a part of our team and I believe he will be a key player for us.
"Manchester United offered him a new deal, but he wanted to leave to pursue his career, which says a lot about him."