Scott Hogan has crossed the second-city divide after joining Birmingham on loan from Aston Villa for the remainder of the season.
The striker's spell at Stoke was cut short by Villa after he started just five games since moving on a season-long loan.
The 27-year-old scored twice in 13 Sky Bet Championship games but fell out of favour under Stoke manager Michael O'Neill, having initially been brought in by Nathan Jones.
Hogan, who has eight caps for the Republic of Ireland, signed for Villa back in January 2017 after impressing at Brentford.
However, injury hampered his progress during the club's stint in the Sky Bet Championship. He started five games and came off the bench nine times in their play-off winning campaign last season, scoring twice.
The Villa-Blues rivalry means only a handful of players have moved directly between the clubs this century.
Liam Ridgewell (2007), Craig Gardner (2010) and Curtis Davies (2011) all left Villa for Blues, while last summer Gary Gardner did likewise with Jota heading the other direction.