Charlton boss delighted to land Man City's Mills
"We also needed someone who is aware what this division is about. I think Danny will be important for us and with Yassin Moutaouakil still three or four weeks away with an ankle injury, it is a good signing.
"He's coming back to a club that he knows well. He had an absolutely fantastic offer to go to Leeds United but his heart was always a little bit with Charlton. He couldn't wait to get back here and I hope the fans respond to him the way he has responded in training because he's been great so far."