Romelu Lukaku has completed his transfer from Anderlecht and will be available for selection for Saturday's game.
The new striker will wear the number 18 shirt and has given an exclusive first interview to the official Chelsea website.
The 18-year-old striker has already scored twice in 10 appearances for the senior Belgium team, and was on international duty this week he played 60 minutes in their goalless away draw with Slovenia.
Since making his club debut when just 16, Lukaku, the son of a former Zaire international, Roger, has averaged nearly a goal every two games and scored 16 times in 37 league games last season.
