Usha Mittal, Tina Ambani in Forbes list

They are married to the wealthiest individuals in the world but a few of them have etched out their own identity, with two Indians -- Usha Mittal and Tina Ambani making a cut in the latest 'Wives of Billionaires' list compiled by US business magazine Forbes.

Usha Mittal is the wife of world's fourth richest person and steel tycoon Lakshmi Mittal while Tina Ambani is married to sixth wealthiest person Anil Ambani, whose flagship firm Reliance Communications is currently in talks with South African telecom major MTN for a possible amalgamation.

In an article on its website, Forbes said that "gaining membership to the billionaire wives' club is no easy feat... so what does it take to marry one?... For starters, looks are great -- but brains are even better."

Taking about 53-year old Tina Ambani, the magazine said that "being famous of your one accord is often a plus." Prior to marrying Anil Ambani, Tina Munim was a famed Bollywood actress, it noted.

She made her name in the 1978 Hindi blockbuster Des Pardes and has starred in more than 30 films and "now her husband, Anil Ambani, ranked sixth-richest in the world in March, is reportedly in talks through one of his companies to become Steven Spielberg's Dreamworks SKG's principal financier.

"Patron of contemporary Indian art is mother of two sons," it noted.