| He adored dancing to classic Hindi songs and was a Bollywood enthusiast from a young age. |
| His career aspirations ranged from a hair stylist at 4, doctor at 10, copywriter at 15, to eventually settling on becoming a filmmaker at 20. |
| In 1989, he made his debut on Doordarshan TV's Serial Indradhanush as Shrikant. |
| Karan's Bollywood debut was in Dilwale Dulhania Le Jayenge (1995) playing the character Rocky. |
| Initially superstitious about the letter 'K', Karan named his movies with 'K', until watching Lage Raho Munna Bhai led him to drop this belief. |
| Referred to as 'Mumma's Boy', he shares a very close bond with his mother. |
| He also worked as a costume designer for Shah Rukh Khan in numerous films like DDLJ, Dil Toh Pagal Hai, and more. |
| Karan assisted the late director Yash Chopra before pursuing his own career as a filmmaker. |
| Dreams of winning an Oscar and expressed a desire to dedicate it to India. |
| Proficient in French with a master's degree in the language. |
| Karan has a passion for cricket and enjoys playing the sport in his free time. |
| Served as a jury member at the Miss World contest in 2006, becoming the first Indian filmmaker to do so. |
| Recognized as one of the 250 Global Young Leaders in 2007 by the World Economic Forum. |
| Despite his precision on sets, he dislikes reading scripts. |
| Played the role of Kaizad Khambatta in Bombay Velvet for a fee of just ₹11. |
| Enjoys sporting velvet jackets. |
| Wrote the script for "Ae Dil Hai Mushkil" in 30 days. |
| While Shah Rukh Khan is his best friend, he admires Hrithik Roshan's work ethic. |
| Harbored a crush on Twinkle Khanna before her marriage to Akshay Kumar. |
| Opened up about past struggles with depression and anxiety during an interview with NDTV. |
| Became a single parent to twins, Yash Johar and Roohi, through surrogacy in 2017, and delivered a TED talk dedicated to them. |
| Described as a sensitive and emotional individual by his mother. |
| Dislikes responding to emails, preferring personal calls or having his secretary reply. |
| Recalled his father calling him "mad" for wanting to cast Amitabh Bachchan, Jaya Bachchan, Hrithik Roshan, Shah Rukh Khan, Kareena Kapoor, and Kajol in one film during the casting process of 'Kabhi Khushi Kabhie Gham...'. |
