Premi Vishwanath is an Indian television actress from Kerala who predominantly appears in Malayalam and Telugu television shows and films. She is known for her role as Karthika/Karthu in the soap opera Karuthamuthu, which premiered on Asianet and also for portraying Deepa in the Telugu serial Karthika Deepam on Star Maa.
Premi Vishwanath began her acting career in Malayalam television with Karuthamuthu, in which she played the lead role of Karthika Balachandran. She received the Best Debutante Female award at the 2014 Asianet Television Awards for her performance in the series. Following her exit from Karuthamuthu, she appeared as Mayilamma in Moonumani, which aired on Flowers (TV series).
She later entered the Telugu television industry and gained wider recognition for portraying Deepa in Karthika Deepam (Telugu TV series), the Telugu remake of Karuthamuthu. The series aired on Star Maa from 16 October 2017 to 23 January 2023. She reprised the role in Karthika Deepam 2, which premiered on 25 March 2024 and is a remake of Chellamma (TV series).
She is related to actor Jayasurya.