"That genius kid Kautilya Pandit, just above five years and answers questions that many scientists and knowledged persons could never (answer)," Bachchan posted on micro-blogging site Twitter Friday night.
He also added: "He knows all the galaxies that exist in universe, and their complicated names."
For his exceptional intelligence quotient (IQ) and memory, Kautilya was recently awarded Rs.10 lakh by the Haryana government.