Blues have completed the signing of Hibernian left-back David Murphy after the highly-rated 23-year-old passed a medical this afternoon.
Boss Alex McLeish is confident that his new £1.5 million man has all the qualities to play at the highest level.
Murphy started his career at Middlesbrough and played 13 Premier League games before moving north of the border.
McLeish believes that the defender has the hunger to succeed.
"He wants to prove himself in the Premiership," said the Blues manager.
"Any time I've seen him in Scotland over the past two or three years he's a full back who likes to get forward but has obviously got good defensive qualities as well.
"He's a player I've admired for a long time and I made enquiries to see if he had any Scottish blood in him when I had the Scotland job because we would have certainly brought him into the fold with the national team given the displays that we saw up there."
Murphy will take up the squad number 14 which was recently vacated by Neil Kilkenny.
Blues' new boy will hopefully be available to play in Saturday's big home game against Chelsea, as long as international clearance is received by 5pm on Friday.
However, McLeish added that he would need to check on the defender's fitness as he has not played since before Christmas due to injury.
"He's not done much this week and he's not played for a couple of weeks also with a hamstring injury so there's no point in making any decisions at this point," he said.