Lonkar was born in Aurangabad, Maharashtra. Her father was a doctor and her mother a teacher. After finishing her schooling till 10th, she opted for Arts and followed her interest in theatre. Lonkar moved to Mumbai for boosting her acting career. She worked in various TV serials both in Marathi and Hindi language. After playing the lead role of Damini on the TV show of same name on DD Sahyadri, she came to be known for it. Her Hindi TV serial Kahaani Nahi.... Jeevan Hai was remade as Vasudha in Marathi. She played the lead role in both serials Since June 2012 she appearing as Yashoda Vaishnav in Byaah Hamari Bahoo Ka.