The 21-year-old has signed a three-year deal with the Latics and joins for an undisclosed fee.
He said: “I am just happy that my future has been sorted out now. I can’t wait to start training, meet all my new team mates and start fighting for my place in the team.
“Roberto Martinez has big ambitions for the club and he made it clear how much he wanted me to be here. When a manager is so positive about you, then it is an easy decision to make.”
“Franco is an Under-20 international for Argentina with great Premier League experience having worked at a club with the calibre of players of Chelsea, and also spending a hugely beneficial year on loan at an established club like Blackburn Rovers,” said Wigan manager Roberto Martinez.
“We all feel that Franco can fulfil his potential at our football club and he’ll bring a completely different dimension to our squad with his presence, technical ability and hard-work.
“We’ve been following Franco for a long time and from his point of view it’s clear that he is desperate to play for Wigan Athletic and his desire and commitment is exactly the right attitude for our club.”
