Advani was born to a Sindhi father, and her mother is of Punjabi, Scottish, Irish, Portuguese, and Spanish ancestry.
Kiara Advani was born Alia Advani on July 31, 1992, in Mumbai, Maharashtra, India. Her parent are Jagdeep Advani, a businessman, and Genevieve Jaffrey. Advani also has a younger brother, Mishaal. She is also related to several celebrities via her maternal family.
Actors Ashok Kumar and Saeed Jaffrey are her step-great-grandfather and great-uncle, respectively, whereas model Shaheen Jaffrey and actress Juhi Chawla are her aunts. Her family is also very close to actor Salman Khan.
Advani changed her first name to Kiara prior to the release of her first film, Fugly.