Kapoor was born in Mumbai. His father, Avikishore Kapoor was in the construction business and his mother, Kanan is a singer and homemaker. His parents are originally from Amritsar, Punjab. Kapoor trained for an acting career under Barry John, and became a part of Motley, a theatre group run by acting legend Naseeruddin Shah. He began his career as an assistant director. Kapoor made his movie debut as the male lead opposite Tabu in Meenaxi: A Tale of Three Cities . His next film was the Aamir Khan starrer Rang De Basanti (2006), for which he received a nomination in the Filmfare Best Supporting Actor Award category. In 2009, Kapoor started writing weekly columns for HT City, the lifestyle supplement of the Hindustan Times. He is a trained pilot, and rally car driver. He co-founded Asia's largest crowdfunding platform called Ketto,which raises money for social and individual causes. To date, the platform has raised close to 120 million dollars.