18 December, 2017
The unsafe playmaker told Globo TV on Sunday that "the cycle of my career as a player ends here".
The 35-year-old called time on his stint with MLS side Orlando City in October and a return to boyhood club Sao Paulo was thought to be the only option on the table when it came to possibly extending a stellar career.
The former Brazil worldwide has, along with Sao Paulo, been linked with a return to AC Milan, where he won the Champions League, Serie A and the Ballon d'Or during the peak of his career.
He confirmed his retirement on his official Twitter account, saying: "Father, It was much more than I could ever imagined".
"I needed time to think and take a decision calmly", Kaka said.
Kaka won 92 caps for Brazil, scoring 29 goals and featuring at three World Cups, forming part of the squad that lifted the trophy in 2002.
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Kaka tweeted Sunday that "I'm now ready for the next journey".
He said Milan, with whom he won the Champions League in 2007, had offered him a role but did not specify the exact nature of the job or say if he would accept it.
He also added that he might continue taking part in the football world: "I will continue in football but in a different role".
"I prepared myself a lot to be a professional footballer and I want to prepare myself for this new role, I want to see and observe a little from afar".
"I would like to join a club as a sports director, someone who stands between the field and the club".
Having struggled with a series of knee injuries, Kaka returned to Milan for one season in 2013 before leaving for Orlando the following year.