Ireland underage star Mark McGuinness has left Arsenal for a three-year contract with Mick McCarthy's Cardiff City.
The Slough-born 20-year-old spent last season on loan with League One outfit Ipswich, where he impressed in making 25 appearances.
Now, after spending ten years on the Gunners' books, he has signed a long-term deal with Championship side Cardiff City.
The defender said: "As soon as a club like Cardiff City were interested I was excited and I couldn't miss this opportunity.
"It's nice to get everything sorted early on and hopefully I can meet the boys and get going.
"My job is to stop the ball going into the back of the net. I love heading and I love defending. It's a great opportunity for me to learn and improve in the next few years at the club."
McGuinness becomes McCarthy's second signing of the transfer window following the addition of fellow Ireland international James Collins, who joined the club following the expiry of his contract at Luton Town.
