The 20-year-old will wear the no.7 shirt.
A deal has been agreed for the loan of midfielder Cesare Casadei to Leicester City from Chelsea.
The agreement is that he will be at the club until the end of the 2023/24 season.
Casadei was awarded the Golden Boot and Golden Ball for his work in the Italian Under-20 side that reached the final of the FIFA Under-20 World Cup.
The 20-year-old will wear the no.7 shirt.
Cesare Cesare said: “I feel really good. I’m really happy to be here, I’m excited and I can’t wait to get started. Obviously, Leicester is a big team so I’m here to win and to do as well as possible to fight and to work hard for this team.”
Enzo Maresca's Foxes are playing next on Saturday in a fixture at home to Cardiff City.