Mirna Menon is an Indian actress who works in Malayalam, Tamil, and Telugu films. She was born on December 15, 1992 in Chennai, India. Her real name is Sayna Santhosh, but she has used several stage names, including Athira Santhosh and Athithi Menon. She first appeared in the 2016 Tamil film Pattathaari under the name Adhiti Menon. In 2018, she made her debut in Kalavani Mappillai. In September 2019, she appeared in the Big Brother movie, and then changed her stage name to Mirnaa Menon. 

Menon is known for her roles in Jailer (2023), Big Brother (2020), and Ugram (2023). She has also appeared in the TV show Anantham.