The 25-year-old, who started his career at Le Havre, made 88 appearances for the Italian team, who were promoted back to Serie A last season.

"It's an honour to be here," he said. "I feel very good, very welcomed and the training ground is very impressive.

"There's been a lot of impressive players at the club. It's going to be a challenge in the Premier League but one that I'm very much looking forward to."

Coulibaly is the first signing made by Ruud van Nistelrooy, who took over as Leicester manager in late November.

The former Premier League champions, promoted back to the top-flight in April last year, are currently second from bottom of the table, two points from safety.

The Foxes host Crystal Palace later on Wednesday.