Becks is set to join the Italian giants on loan in January, but Kaka reckons it could turn into a permanent move.
He told the Sun: “These three, four months that he comes here could turn into years.”
Kaka continued: “I’m really happy, as I’ve never played with Beckham.
“Everyone who has played with him says he’s a great player, a person that can help Milan.”
He added: “I think Beckham might be tempted to stay when he trains with so many great players.”