Rooney ends playing career to become full-time Derby boss
Derby confirmed the 35-year-old former forward had agreed a permanent deal until 2023, having succeeded Phillip Cocu on an interim basis in November.
“Our recent upturn in results under Wayne was married together with some positive performances."
"To be given the opportunity to follow the likes of Brian Clough, Jim Smith, Frank Lampard and Phillip Cocu is such an honour," he said.
"And I can promise everyone in involved in the club and all our fans, my staff and I will leave no stone unturned in achieving the potential I have witnessed over the last 12 months of this historic football club.”