Isha Ambani just 16, is worth $80 million. Isha Ambani, 16 year old daughter of Reliance Industries Limited (RIL) Chairman and Managing Director Mukesh Ambani, is the youngest of the top ten billionaire heiresses ranked by Forbes. Isha was ranked second in the list. Vanisha Mittal, Isha Ambani and Pia Singh -- daughters of Lakshmi Mittal, Mukesh Ambani and K P Singh respectively -- have grabbed the top three rankings on a Forbes list of billionaire heiresses.
Indian-origin steel tycoon Lakshmi Mittal's daughter Vanisha Mittal Bhatia has emerged as the potentially richest among those standing to inherit a fortune, according to US business magazine Forbes.

Vanisha is followed by Isha Ambani, the richest resident Indian Mukesh Ambani's only daughter, at the second rank, and another Indian billionaire K P Singh's daughter Pia Singh at the third position in the Forbes list of the world's likely- to-be richest heiresses.

Isha Ambani own stake in the family's Reliance Industries, worth about $80 million.
source economics times
Isha was ranked second in the list announced by the magazine recently. She is in the final year of her International Baccalaureate programme.