Ricardo Izecson dos Santos Leite (IPA: [hiˈkaɾdʊ iˈzɛksõⁿ dʊs‿ˈsɐ̃ⁿtʊs ˈleɪ̯t͡ʃɪ]; born April 22, 1982 in Brasília), better known as Kaká, is a Brazilian midfielder who plays for Italian Serie A club A.C. Milan and the Brazilian national team. He was the recipient of both the Ballon d'Or and FIFA World Player of the Year awards in 2007, and was named in the 2008 Time 100.
Kaká was a part of the five-man midfield in the 2004–05 season, usually playing in a withdrawn role behind striker Andriy Shevchenko. He scored seven goals in 36 domestic appearances as Milan finished runner-up in the Scudetto race. Despite Milan losing the 2004–05 Champions League final to Liverpool F.C. on penalties, he was nonetheless voted the best midfielder of the tournament.
Kaká added the Champions League title to his trophy case for the first time when Milan defeated Liverpool on May 23, 2007. Though he went scoreless, he won a free kick that led to the first of Filippo Inzaghi's two goals, and provided the assist for the second. For his stellar play throughout the competition, he was voted the Vodafone Fans' Player of the Season in a poll of over 100,000 UEFA.com visitors. On August 30, Kaká was named by UEFA as both the top forward of the 2006–07 CL season and Club Footballer of the Year.

He married his childhood sweetheart Caroline Celico on December 23, 2005 at the evangelical Reborn in Christ Church in São Paulo. Their first child, Luca Celico Leite, was born in São Paulo on June 10, 2008