HITC Sport understands former Leeds and QPR boss has agreed to take charge at Championship strugglers.
Former Sheffield United and Leeds United boss Neil Warnock has agreed to become Rotherham United's new manager, HITC Sport understands from sources close to the club.
Rotherham are searching for a new manager following the sacking of ex-Leeds boss Neil Redfearn earlier this week after just four months in charge at the New York Stadium.
Rotherham are looking to appoint a new manager on a deal until the end of the season as they task the new man with keeping them in the Championship with 16 games left in the season.
A number of names have been linked with the vacancy, but the club's board have opted to go with experienced campaigner Warnock.
The 67-year-old is available after leaving his role as Queens Park Rangers' temporary manager in December and the short-term nature of the Rotherham is understood to appeal to Warnock.
Warnock, who played for the Millers between 1969 and 1971, is expected to tie up the loose ends of the deal in the next 24 hours to allow him to take over for Saturday's clash with Birmingham City.
The Millers are in the relegation zone, three points from safety after back-to-back defeats to fellow strugglers Charlton and Bolton.