Cardiff have signed out-of-contract Plymouth midfielder Tony Capaldi.
Tony Capaldi has won 20 caps for Northern Ireland
The Northern Ireland international, who has won 20 caps, can also play at left-back and will leave Home Park when his contract expires on 30 June.
The 25-year-old joined Argyle on a free transfer from Birmingham in 2003 and has played 132 games for the club.
The Blues and Midlands rivals Wolves were also thought to be interested in Capaldi, but Cardiff have persuaded the player to move to south Wales.
Sunderland, Norwich City and Crystal Palace have also previously expressed an interest for a player who was born in Porsgrunn, Norway, but qualified for Northern Ireland through his Belfast-born mother.
The Bluebirds have not yet released details of the contract with Capaldi, but he is believed to have signed a three-year deal.
Cardiff chairman Peter Ridsdale hailed his capture: "The signing of Tony is an important one for the club.
"We had to be clever and move fast to secure his services and fought off some serious competition.
"We are very pleased that we have managed to make the first signing of our new summer programme."
Cardiff are also thought to be interested in signing Chris Killen who is out of contract at Hibernian, although they may face stiff competition from Hearts for the New Zealand striker.