Former Hereford United midfielder John Eustace has been confirmed as the new manager of Derby County.
Eustace, who was at Blackburn, replaces Paul Warne.
Blackburn have released a statement.
"While we are disappointed by his decision to leave at this crucial stage of the season, we fully understand that the opportunity to move closer to his family and return to a former club played a significant role in his choice.
“The club had hoped that John would see out the season and continue the fantastic work he has done, particularly after strengthening the squad in January and guiding us into a strong position in the league."
Eustace had two spells with Derby during his playing career.
He came to Edgar Street on loan from Stoke in October 2006.