Born into a family where her parents, Randhir Kapoor and Babita, and elder sister Karisma were actors, Kapoor faced the media spotlight from a very young age, but did not make her acting debut until the 2000 film Refugee. Her melodrama Kabhi Khushi Kabhie Gham... became India's highest-grossing film in the overseas market in 2001, and is one of her biggest commercial successes to date. After receiving negative reviews for a series of repetitive roles, Kapoor accepted more demanding parts in order to avoid being typecast, and was consequently recognized by critics for displaying greater versatility as an actress. Her portrayal of a sex worker in Chameli (2004) proved to be the turning point in her career and she was later noted for her performances in the critically acclaimed projects Dev (2004) and Omkara (2006). She went on to play the lead female role in the Imtiaz Ali-directed romantic comedy Jab We Met (2007), for which she received the Filmfare Award for Best Actress, and the drama 3 Idiots (2009), which became the highest-grossing Bollywood film of all time.
Inspired by Bollywood actresses like Nargis and Meena Kumari, as well as her sister Karisma, Kapoor is well-recognized for her fashion style and her film roles, both of which have contributed in making her a style icon for young women. Her contributions to the film industry have garnered her numerous achievements including six Filmfare Awards, among nine nominations, making her a leading actress of Hindi cinema. In addition to film acting, Kapoor is a regular stage performer and has launched her own clothing line in association with being the former brand ambassador for the retail chain Globus. Her off-screen life, including her relationship with actor Saif Ali Khan, is the subject of wide media coverage in India.