Bolton Wanderers have completed the signing of Millwall midfielder Liam Trotter on a permanent deal.
The 25-year-old spent the second half of last season on loan at the Reebok Stadium, scoring one goal in 16 games.
Trotter, who will officially join Bolton on July 1, has signed a three-year contract with the Championship side.
The midfielder leaves Millwall following a four-year spell at The Den.
Bolton recently finished in 14th place in the Championship table.