Birmingham have signed midfielder Tom Adeyemi from Norwich on a free transfer.
Adeyemi, who was out of contract at the Premier League club this summer, joins the Blues on a two-year-deal and will officially become part of Lee Clark's squad on July 1.
"He's a player I know really well," said Clark. "I worked with him during my time at Norwich when he was a youngster at the club.
"I've followed his progress since. He's done exceptionally well on loan at a few different clubs and I'm delighted to bring him here.
"Tom is a terrific young lad who is a powerful and athletic midfield player who can get forward and score goals."
The 21-year-old has spent most of his career out on loan, making more than 100 appearances during spells at Bradford, Oldham and last season at Brentford.
Adeyemi made 39 appearances for the Bees, scoring three goals, as Uwe Rosler's side narrowly missed out on promotion to Yeovil in last season's League One play-off final.