Ronaldo de Assis Moreira was born 21 March 1980 in the city of Porto Alegre, the state capital of Rio Grande do Sul, Brazil.

Ronaldinho's career began with the Grêmio youth squad.

Ronaldinho was identified as a rising star at the 1997 U-17 World Championship in Egypt, in which he scored two goals on penalty kicks.

In 2001, Ronaldinho signed a five-year contract with French club Paris Saint-Germain in a €5 million transfer.

Brazil won the world cup.

Barcelona entered the running for Ronaldinho and outbid Manchester United for his signature in a €30 million deal.

Ronaldinho won his first league title in 2004–05, and was named FIFA World Player of the Year for the first time on 20 December 2004.

Ronaldinho was the captain of Brazil and led his team to its second-ever Confederations Cup title in 2005.

The 2005 Ballon d'Or, given to the best football player in Europe as judged by a panel of sports journalists from UEFA member countries, was delivered to the Brazilian midfielder Ronaldinho on 28 November 2005.

In July 2008, Ronaldinho turned down a £25.5 million offer from Manchester City of the Premier League to join Italian Serie A giants A.C. Milan on a three-year contract thought to be worth around £5.1 million (€6.5 million) a year, for €22.05 million plus €1.05 million bonus each season (€24.15 million in 2010).

After being heavily linked with a move back to his childhood club Grêmio, Ronaldinho joined Flamengo on 11 January 2011 with a contract ending in 2014.

Ronaldinho helped Atlético win the Campeonato Mineiro and led the club to its first title of the Copa Libertadores.

Ronaldinho helped Atlético win the Campeonato Mineiro and led the club to its first title of the Copa Libertadores.

Signed a two-year contract with Mexican club Querétaro on 5 September 2014.

On 11 July 2015, Ronaldinho announced his return to Brazil and signed an 18-month contract with Fluminense.

On 16 January 2018, Ronaldinho confirmed his retirement from football.

In July 2019, 57 properties belonging to Ronaldinho along with his Brazilian and Spanish passports were confiscated because of unpaid taxes and fines.

In March 2020 Ronaldinho was questioned by police in Paraguay after he was alleged to have used a fake passport to enter the country, with Ronaldinho and his brother both being held in custody in the country.

Ronaldinho released after spending 32 days in prison.