Kaka has been linked with a return to the San Siro this summer.
"Getting back with Kaka? We are here waiting with open arms," Berlusconi told La Gazzetta dello Sport.
"Of course we would be interested in him. He is as great a player as he is a great person.
''I have not talked about money. I haven't spoken to [Milan vice-president Adriano] Galliani about this either. We know nothing [about the player's situation at Real Madrid]. But we're here with open arms.''