[1] He is the youngest actor in India to receive the National Film Award for Best Actor for his performance in the film Nagarkirtan.

[3] Born in Kolkata, Riddhi Sen is the son of Bengali stage and film actor Kaushik Sen and dancer Reshmi Sen, and grandson of actress Chitra Sen and actor Shyamal Sen.[4][5] Sen has acted on stage from an early age, with his grandmother saying "From a very tender age he is performing at ‘Prachya’, I remember carrying him through the crowds at the age of 3.

"[5] He is a regular actor of the theatre group Swapnasandhani[6] and is an alumnus of South Point school, Kolkata.

In 2010, he received a special talent award from his school for his achievements in the field of theatre.

[7] Appearance created by Parambrata Chatterjee Sen's first directorial debut is a short film based on the author Nabarun Bhattacharya's short story, Coldfire, a dystopian dark comedy, which released in 2021.