Gary Rowett has made his first signing as Derby boss with the capture of defender Curtis Davies from Sky Bet Championship rivals Hull for an undisclosed fee.
The 32-year-old, a former West Brom, Aston Villa, Leicester and Birmingham player, has signed a two-year deal with the Rams following Hull's relegation from the Premier League.
"I'm very excited," Davies told RamsTV.
"I spent four years with Hull; four years that I really enjoyed through the highs and the lows. I felt, though, that it was time for a new challenge for myself.
"It was all very quick but, the opportunity to play for this manager in a team which is very strong, I believe it's a good opportunity for us as a team to get back into the Premier League.
"We've seen what Derby can do and I believe, under this manager for a full season, the squad that we've got is more than capable of promotion or at least the play-offs."
