This is Tina Ambani, wife of Anil Ambani--the sixth richest man in the world. (Photo from Forbes)
She was Tina Munim and was a hindi film star. Later, as most female actors of those days did, she married a rich guy and ditched movies.
The only movie of hers that I watched was Karz, which was one heck of a masala movie.
Here is a youtube clip from Karz: (Click here for a translation of the Hindi lyrics to English)