Derby have signed George Thorne on a permanent deal from West Brom.
The 21-year-old midfielder, who played 12 games for Derby during a loan spell last season, joins on a four-year deal for an undisclosed fee.
Albion's technical director Terry Burton said the club sanctioned the transfer after Thorne twice asked for a move this summer.
And Derby have now landed an England youth international who was identified as a transfer target by Steve McClaren as far back as November.
McClaren told the club website: "We're really pleased that George Thorne has joined us on a permanent basis.
"I am sure the fans will be delighted to welcome him back and we're equally pleased that he sees Derby County as the right place for him at this point of his career.
"He was one of the first players I spoke about with our Head of Football Operations Chris Evans when he arrived in November, and we were well aware of his qualities when he joined us on loan in January.
"After being patient in waiting for his chance in the side, he showed what he could do on the pitch. His level of performance was excellent.
"It's taken a lot of hard work for us to get to this stage but I think it says a lot about where we are at as a club that we've been able to bring someone like George in permanently.
"Credit should go to our President & Chief Executive Sam Rush for the time and effort he has put in to get this transfer completed."
Rush said: "I am delighted that after lengthy negotiations, we have agreed a deal with West Bromwich Albion for the transfer of George Thorne.
"I think this transaction demonstrates that Derby County is a very competitive football club and I would like to particularly thank our Ownership Group, who have provided substantial support to the club to enable this deal to be concluded."