His brothers Kishore Kumar and Anoop Kumar also acted in films. The three brothers worked together in the comedy Chalti Ka Naam Gaadi. Ashok, though the eldest of the three by quite a margin, survived them both. In fact, he stopped celebrating his birthday after the youngest brother, Kishore, died on that day in 1987. His sister, Sati Devi, was married to Sashadhar Mukherjee of the Mukherjee-Samarth family.