Kaka always wanted to return to AC Milan.
The former Real Madrid midfielder is back to his best at Milan this season.
"I dreamt of wearing this shirt again and I hope to continue doing so for many more years," the 31-year-old said.
"I missed the environment of [training base] Milanello and the history of this club. That is what I missed when I was in Madrid.
"I like hanging around Milanello, talking to those who work there and remaining in close contact with them."
Worried about World Cup accommodation prices? Then check out the Favela Experience - the answer to your problems!