AC Milan vice-president Adriano Galliani hopes Kaka will remain with the Rossoneri for the remainder of his career following the Brazil playmaker's decision to sign a new two-year deal.
Kaka, 25, is now contracted to the club until June 2013, when he will be 31 years old.
'Kaka has repeatedly stated that he wants to become a symbol of this team,' said Galliani on www.acmilan.com.
'He's the best footballer in the world and he's decided to tie himself definitively to Milan.
'This is a life contract. I hope that in 2013 I will make him a new contract but now we already know Kaka will delight Milan's fans until the end of his career. It's great news for all us Milan fans.'
Kaka has repeatedly been linked with a move to Real Madrid over the past 12 months but Galliani insists the player's intention was always to remain at the San Siro.
He added: 'Kaka has made this decision. He always had the conviction, but never as strong as in the last few months.
'Kaka is a symbol of the football expressed by Silvio Berlusconi's Milan. At the moment he is the best footballer in the world, and he's surrounded by great players, like (Andrea) Pirlo and (Clarence) Seedorf, who give this team a lot of quality.
'With these players Milan are the defending European Champions and World Champions.'
The Brazilian helped Milan win last season's Champions League with a tournament-leading 10 goals.
He also scored one goal and set up two more in December's Club World Cup final as Milan beat Argentina's Boca Juniors.
Kaka is currently sidelined with a knee injury which is threatening to keep him out of next week's Champions League tie against Arsenal.
