Portsmouth have signed defender Andy O'Brien on a four-year deal from Newcastle United for £2m.
The Republic of Ireland international, 25, spent four years on Tyneside after joining from Bradford for £1m in 2001, making 172 appearances.
Pompey chief executive Peter Storrie said he was delighted to sign O'Brien.
"We have signed a first-class player who has played at the top for both club and country and has a very prominent record," he said.
O'Brien looked set to stay at St James' Park when he signed a year's contract extension in January, but boss Graeme Souness has now allowed him to leave.
His confidence suffered towards the end of last season after a series of uncharacteristically shaky displays.
He becomes the second defender to leave Newcastle this summmer following Aaron Hughes' £1m switch to Aston Villa.
Souness has targeted Belgian international centre-back Daniel van Buyten annd Manchester City stopper Sylvain Distin as potential replacements.
The Magpies already have Titus Bramble, Jean-Alain Boumsong and promising youngster Steven Taylor in their squad.