Northern Ireland international George Saville has joined the club from Millwall, initially on loan before making the switch permanent in January.
The 25-year-old completed the formalities of his switch on Friday afternoon.
A former Chelsea youngster, Saville has clocked up 176 career appearances and has had loan spells with Brentford, Bristol City, and Wolves, as well as his current club Millwall.
Saville featured prominently for the Lions last season, scoring 10 goals in 45 appearances as Neil Harris’ side made an unexpected challenge for a Play-Off spot after a storming second half of the season.
He made four appearances for Millwall this season and featured in our 2-2 draw at the Den on the opening day of the season.
A box-to-box midfielder, Saville has five caps for his country, and has played alongside fellow summer recruit Paddy McNair for Northern Ireland.