Kieran Lee has completed a free transfer switch to Sheffield Wednesday having turned down a new contract at Oldham.
The right-back, a star performer for the Latics over the past two years, initially spoke to the Owls around two weeks ago and a three-year deal has finally been agreed.
Lee came through the youth system at Manchester United before joining Oldham in 2008, making a total of 134 appearances for the club, including 53 last season.
The 23-year-old's performances have seen him dominate Oldham's end of season awards in both 2010/11 and 2011/12.
Lee will now ply his trade in the Championship as Owls boss Dave Jones strengthens his side following automatic promotion from League One.
And Latics boss Paul Dickov hopes Lee succeeds in the second tier, telling Oldham's official website: "I would like to wish Kieran all the best, he has been a fantastic player and I am happy he is joining a Championship club as he deserves to play at that level."