Carlos is the marquee manager cum player of Indian Super League (ISL) outfit Delhi Dynamos, whose match against NorthEast United here tomorrow will be watched by star British boxer Amir Khan.
It was learnt that Carlos, who is a very good friend of the 39-year-old Ronaldo, regarded as one the best strikers the game has seen, talk regularly over phone with him.
Asked if Ronaldo is interested in visiting India, Millington responded in positive.
Ronaldo and Carlos were part of the Brazilian team that triumphed in the 2002 World Cup four years after their humiliating loss in the final of the 1998 showpiece event.
Carlos and Ronaldo were also the integral part of Real Madrid's famed Galacticos squad.