The Korean has completed his transfer to the Liberty Stadium, putting an end to the Swans' drawn-out pursuit of the midfielder, as he looks to fill the boots vacated by Joe Allen
The South Korea international has been a long-term target for the Premier League club, after impressing for the SPL side since joining in 2010 with his performances prompting reported interest from Arsenal.
Ki, who becomes the most expensive player South Korean football history following the move with the fee a reported 5 million pounds, revealed that the club's philosophy attracted him to the Swans.
“When I look at Swansea I see a club that is growing and growing, and the style here is very attractive to me,” he told the club's official website.
As revealed by Goal.com earlier on Friday, Laudrup is keen to add further new faces to his squad at the Liberty Stadium with Pablo Hernandez of Valencia, Tom Ince of Blackpool and Bristol City’s Albert Adomah all interesting the Dane.
And chairman Huw Jenkins confirmed that the arrival of Ki was possible due to the sale of influential midfielder Joe Allen to Liverpool.
"Having lost Joe Allen recently, it was vital that we invested the money wisely by bringing quality young footballers into the club with potential to grow further," Jenkins said.
"Ki fulfils that criteria and everyone in the football club is excited about the prospect of him playing and developing with us."