Birmingham have landed Republic of Ireland international Scott Hogan from Aston Villa for an undisclosed fee.
The 28-year-old striker, who was on loan at St Andrew's last season, has agreed a four-year contract.
Hogan initially joined Blues in January and scored seven goals in 17 appearances.
He was snapped up by Villa for £9m from Brentford in 2017 but failed to establish himself and also had spells on loan at Stoke and Sheffield United.
Hogan has won eight senior caps for Ireland since making his international bow two years ago, but was deemed surplus to Stephen Kenny's requirements for the Uefa Nations League games against Bulgaria and Finland earlier this month.
The striker is Blues boss Aitor Karanka’s eighth summer signing, following in the footsteps of George Friend, Jon Toral, Jonathan Leko, Andres Prieto, Adam Clayton, Ivan Sanchez and Neil Etheridge.