Kapoor died of complications related to asthma on June 2, 1988 at the age of 63 in New Delhi.
Remembering his father, the 64-year-old actor took to Twitter, where he quoted a line of the iconic song "Jeena Yahaan Marna Yahaan" from the film "Mera Naam Joker".
"Papa, today 29 years ago, you left us. 'Par hum tumhare rahenge sada' (But we will always be yours)," wrote Rishi alongside a still from "Sangam".
Born on December 14, 1924 to Prithviraj Kapoor in Peshawar (now Pakistan), Kapoor made his official acting debut with 1947 film "Neel Kamal" and went on to become "the greatest showman of Indian cinema".
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At the age of 24, Kapoor became the youngest filmmaker of his time when he made his directorial debut with "Aag" (1948) featuring himself alongside Nargis, Kamini Kaushal and Premnath.
Kapoor was famous for his Charlie Chaplin-esque style of acting, which garnered attention not only from the Indian audience but also made him a fan-favourite in Russia.
Rishi, in his recently-released autobiography "Khullam Khulla", talked about his relationship with his father.
"My father loved his cinema, his booze, his leading ladies and his work. But for a man legendary for his hospitality, he was very possessive of his whisky," he writes.
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