Following the announcement about Sarath Kumar and Devayani coming aboard Siddharth 40, the makers also announced the inclusion of Meetha Raghunath and Chaithra Achar to the cast. 

Shanthi Talkies, the production house behind Siddharth's upcoming film with 8 Thottakal (2017) and Kuruthi Aattam (2022) filmmaker Sri Ganesh, announced the news on their X account on Sunday.

Meetha was last seen in the 2023 romantic-comedy Good Night alongside Manikandan K., while Chaithra, who will make her debut in Tamil Cinema with the film, was last seen in the Kannada thriller Blink (2024). The actors also took to their respective X accounts to post the updates.

This will be Shanthi Talkies' second production venture following the Sivakarthikeyan-starrer Maaveeran last year, which interestingly completed one year after release on Sunday.