Jethwani was born in Ahmedabad, Gujarat into a Hindu Sindhi family. Her father, Narendrakumar Jethwani is a Merchant navy officer and her mother, Asha Jethwani is a manager with The Reserve Bank of India and a Gold medallist in Economics. Her maternal grandfather was a prominent social worker. She received her school education from Prakash Higher Secondary School, Mount Carmel High School and Udgam School in Ahmedabad. She started training in Bharatnatyam at the age of five and obtained Visharad (Bachelor of Arts) degree (on completion of seven years course) at twelve. She ranked fifth in the Gujarat Higher Secondary Examination. She played chess competitively during her school years and represented Gujarat at the National Chess Championships. As a kid, she also modelled regionally for brands such as Nippo batteries, Gayatri dairy and Maruti bread for the Gujarat market.

She finished her M.B.B.S. from Smt. NHL Municipal Medical College in Ahmedabad. While finishing her degree, she won Miss Gujarat, Miss Gujarat University, and Miss Ahmedabad Times titles.

Films

Jethwani relocated to Mumbai with her mother's job transfer to the city. There, a chance meeting with the director Muazzam Beg led to the lead role in Rajtaru Studios' Bollywood comedy-drama 'Sadda Adda' (credited as Kahkkashan Aryan). The same year, she made her Malayalam debut with B. Unnikrishnan's thriller set in Bangkok, 'I Love Me', alongside Asif Ali and Anoop Menon. 2013 saw her starting the shoot for her Tamil debut as the heroine for Senthatti Kaalai Sevatha Kaalai directed by Saran, and the lead in Dharmesh Darshan’s Punjabi film, but both the projects were shelved then. Next, she debuted in Kannada with Rajkumar Reddy's supernatural horror film 'Ouija' produced by Vega Entertainment.

Modelling Work

Jethwani has been the face of advertisement campaigns for Videocon d2h, Cygnus jewellery, Mahindra Xylo, Shoppers Stop, Rahna homes, Vespa, Pond's White Beauty BB+ Fairness cream and Jashn sarees among other brands, and featured on the cover pages of Femina (India) and LSF magazine and on Femina calendar. She has also had a stint on the runway, at India Runway Week, numerous Femina Showcases, and for Indian fashion and jewellery designers, and featured in Punjabi Music videos.^[12][13]

• 2000: Winner: Open Gujarat state under-14 Girls' Rapid Chess tournament - represented the state at the National tournament^[18]
• 2004: 5th rank in Gujarat state - 1st rank among girls - Higher Secondary Examination^[19]
• 2009: Winner: Miss Ahmedabad Times^[20]
• 2010: Winner: Miss Gujarat, Miss Gujarat University^[9]
• 2013: Winner: Ponds Femina cover girl contest (Face of Radiance), subtitles: Jashn Indian Beauty, Fresh Face