Wigan have completed the capture of Chilean winger Jean Beausejour from Birmingham on a two-and-a-half-year deal.
The Latics have been closing in on the signing of Beuasejour for some time after identifying him as somebody who could play a key role at the DW Stadium.
The 27-year-old underwent a medical earlier on Wednesday and he has now sealed his switch to the Premier League club for an undisclosed fee.
Beausejour had joined Birmingham in the summer of 2010 after an impressive World Cup and Roberto Martinez is looking forward to working with him.
Martinez has been trying to bolster his attacking options this month to help Wigan pull clear of trouble and avoid relegation to the Championship.
"Jean is a player we have been tracking for a long time since he made a huge impression on us with his role for Chile in the World Cup," Martinez told the club's official website.
"Now Jean has 18 months of experience in the British game and his dynamism, technical ability and tactical concepts will bring a different dimension into our squad.
"He is ready to bring his own experience and his energy into the fantastic challenge that as a football club we're facing in the next 16 games of the season."
Beausejour, who has made 43 appearances for his country, is also relishing the prospect of trying to make an impact at Wigan.
He said: "Roberto told me about the plans he has for the club and I am really excited to join and meet my team-mates.
"We have a really tough end of the season, but I am really looking forward to the challenge ahead.
"I want to thank all the supporters at Birmingham and now I have to concentrate on getting in the team and doing my best for Wigan Athletic."