This was revealed by football transfer expert Fabrizio Romano on Sunday.
According to Romano, Ndidi has already agreed terms with Forest, although both clubs are yet to agree on a fee.
“EXCLUSIVE: Nottingham Forest set to bid for Wilfred Ndidi, proposal expected to be submitted soon for Nigerian DM as he’s top target.
“Understand personal terms have been agreed, and negotiations will now start between clubs. Forest will push to make it happen,” Romano tweeted.
Ndidi is currently playing in the English Championship after the Foxes suffered relegation last season.