Geraldine Indira Viswanathan is an Australian actress. She gained attention in the role of Kayla in the 2018 film Blockers, for which Refinery29 referred to her as "the film's breakout star". Viswanathan starred in the 2019 coming-of-age film Hala, as well as Bad Education. She also played a recurring role in the Australian series Janet King, and stars in the TBS comedy anthology Miracle Workers.