Asha Kelunni Nair, better known by her stage name Revathi, is an Indian actress and director, known for her works predominantly in Tamil and Malayalam cinema - in addition to Telugu, Hindi and Kannada films. She has won several accolades, including three National Film Awards, and six Filmfare Awards South. She has also won the Kerala State Film Award for Best Actress for her performance in Bhoothakaalam (2022).

The Kerala State Film Award for Best Actress is an award presented annually at the Kerala State Film Awards of India since 1969 to an actress for the best performance within the Malayalam film industry. Until 1997, the awards were managed directly by the Department of Cultural Affairs, Government of Kerala. Since 1998, the Kerala State Chalachitra Academy, an autonomous non-profit organisation functioning under the Department of Cultural Affairs, has been exercising control over the awards. The awardees, decided by a jury formed by the academy, are declared by the Minister for Cultural Affairs and are presented by the Chief Minister.