Karan Johar is a person who directs films for a living.
Karan Johar ( born 25 May 1972 ) , often informally referred to as KJo , is an Indian film director , producer , screenwriter , costume designer , actor and television personality who is primarily known for his work in Hindi films . Kuch Kuch Hota Hai ( English : Something Happens ) also known as KKHH , is an Indian Hindi coming-of-age romantic comedy drama film , released in India and the United Kingdom on 16 October 1998 .