Kaka has paid tribute to Ronaldinho after his fellow Brazilian chose to join Milan.
Ronaldinho has agreed a deal with the Rossoneri to end months of speculation about his future.
Manchester City had also been interested but Milan was always Ronaldinho's preferred destination.
The 28-year-old will link up with compatriots Kaka, Dida, Emerson and Alexandre Pato at the San Siro.
Ronaldinho endured a miserable final season with Barcelona but Kaka is convinced that he still has a lot to offer.
"I am very happy with the arrival of Ronaldinho because he brings a lot of quality and skill to Milan that will help us to win titles," Kaka was quoted as saying in the South American press.