Isha lives at an ashram in Kerala, India. She is trained in gymnastics, martial arts, yoga, ballet, kathak, aerial dance etc. She started dancing at the age of seven and has already performed in 22 countries in the last seven years. Her mother is of Indian-origin, Daksha Seth, dancer by profession. Her dad is Australian, Vissaro, a composer by profession. She has been named by her mom (first name) and aunt (last name). "Isha" means goddess, and "sharwani" means Parvati = Goddess Parvati. She originally intended to a vet by profession, but couldn't bear the thought of injecting and hurting animals. She received an email from Subhash Ghai's office, who were looking for an actress with some knowledge of dancing, to act in Bollywood movies. She and her mom went to Bombay to visit Subhash Ghai, and a year later she was signed as the female lead in Kisna: The Warrior Poet (2005) opposite Vivek Oberoi.