"Now it is done! I'm happy to tell you all I'll go back to Ferrari. I have been there before, I won the world championship with them back in 2007 and I still know the team very well.
"We have been talking to them for a while and finally everything is signed and sealed. For the second time in my career, I will be a Ferrari driver. I'm very proud of making a comeback to the Maranello outfit.
"Now we just focus on this season. There are seven races to go, so we have seven races more to get good results for Team Lotus. I will try my very best to finish this season in the best way possible."