The 34-year-old had a glittering career, helping Brazil win two World Cups and being named Fifa World Player of the Year in 1996, 1997 and 2002.
He had been expected to quit at the end of the season but the early elimination of his club, Corinthians, from the Copa Libertadores brought forward the date.
Brazil legend Ronaldo retires from football
We will miss you Ronaldo ...
He had been expected to quit at the end of the season but the early elimination of his club, Corinthians, from the Copa Libertadores brought forward the date.
Brazil legend Ronaldo retires from football
We will miss you Ronaldo ...