Sagittarian Kothari was born in Calcutta and grew up speaking English, Gujarati, Bengali and Hindi. She moved to New Delhi while in 10th standard and received her degree in chemistry from the University of Delhi at Dayal Singh College. Her father is a chemical businessman, her mother home-maker, and she has an older married sister.

After College, Kothari became a model and appeared in a few ads. She moved into films with Jay Jay, a Tamil film which Amoha. She got her break through actor Madhavan, who recommended her for an audition after viewing her photographs. She debuted in Bollywood films James and Sarkar (which came first), both by Ram Gopal Varma. Then she went over to The Killer with Emraan Hashmi and Bhatt do. She went to do some insignificant films and roles, the movie audience is yet to see her in something that could be deemed career defining.

Kothari is known for her daring costumes and sexy numbers that are popular in a mate.