In 1997 she starred in Gupt: The Hidden Truth, one of the most successful films of the year, and her appearance was a major development for female actors in Bollywood. She was the first actress to win the Filmfare Best Villain Award. Her second Filmfare Best Actress Award was awarded for her appearance in Kuch Kuch Hota Hai, the biggest hit of the year.
With husband Ajay Devgan, she also made a successful couple in films such as Ishq (1997) and Pyaar (1998). She married Ajay Devgan in 1999 and is now the proud mother of her daughter, Nysa.
Prior to her comeback on the screen in 2005, Kajol had already begun to actively engage in advertising, mainly with her husband Ajay Devgan.