The 32 year old former Sheffield Wednesday midfielder left MK Dons this summer, after spending 6 years and making over 250 appearances with franchise.
The Star is reporting that he underwent a medical with the Millers today (Tuesday) and will be unveiled tomorrow, becoming the Millers second signing of the season.
Meanwhile, the Millers are rumoured to be close to signing midfielder Ryan Williams who was released by Barnsley this season.
Williams made 17 appearances for the Tykes last season.