Giorgio Costantini (born 16 April 2006) is a Brazilian professional footballer who plays as a midfielder for Argentine Primera Divison club River Plate.
Costantini was born on 16 April 2006. Born in Curitiba, Brazil, he is a native of the city. The grandson of Argentine cardiologist Costantino Costantini, he is the younger brother of Brazilian footballer Facundo Costantini. Growing up, he supported Argentine side River.
As a youth player, Costantini joined the youth academy of Brazilian side Athletico-PR. Following his stint there, he joined the youth academy of Argentine side River during the summer of 2023 and was promoted to the club's senior team in 2025.