Ki Sung-yueng has become Swansea's club record signing after passing a medical and completing a switch from SPL champions Celtic.
The highly-rated midfielder has penned a three-year contract at the Liberty Stadium.
The deal sees the 23-year-old become the most expensive footballer in South Korean history.
Ki will not form part of Michael Laudrup's plans for Saturday's Premier League clash with West Ham, but he is looking forward to opening a new chapter in his career.
"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.
"Last year I watched them a lot in the Premier League and they did things very differently to a lot of the other teams. They wanted to keep the ball and pass it around, which I love to do. When they didn't have the ball they worked so hard to get it back quickly.
"It was very impressive, and I think I can grow as a player here and help the club move forward.
"The manager is another big attraction. I remember watching him when I was younger and I was amazed by how good he was.
"Now I want to learn from him in order to help me become a better player. I learned a lot at Celtic - it helped me become more of an all-round player.
"This is something I have dreamt about since I was a child - playing in the Premier League against the best players in the world. I can't wait to play my first game."
Swansea chairman Huw Jenkins added: "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.
"Ki fulfils that criteria and everyone in the football club is excited about the prospect of him playing and developing with us.
"His tactical awareness and quality has been there for everyone to see, especially playing for his country, and he is well suited to our style of football.
"He has a good educational background behind him from his time in Australia and the few years he has spent at Celtic will make it easier for him to settle quickly and become accustomed to life over here.
"I know he is looking forward to the challenge of playing for the club and Premier League football. We see him as the perfect fit for Swansea City."