Mamitha Baiju (born June 22, 2001) is an Indian actress who works predominantly in Malayalam and Tamil films. She made her acting debut in the comedy-drama *Sarvopari Palakkaran* (2017) and played supporting roles in the psychological thriller *Varathan* (2018) and the cybercrime drama *Operation Java* (2021). She received the Kerala Film Critics Association Award for Best Supporting Actress for the sports drama *Kho Kho* (2021), on which she also worked as an assistant director, followed by roles in *Super Sharanya* (2022) and *Pranaya Vilasam* (2023).

In 2024, Baiju played Reenu in the romantic comedy *Premalu* and made her Tamil cinema debut in *Rebel*. Her subsequent credits include *Dude* (2025), *Jana Nayagan* (2026), *Kara* (2026), *Vishwanath & Sons* (2026), and *Bethlehem Kudumba Unit* (2026).