Geraldine Indira Viswanathan (/ˌvɪswəˈnɑːθən/ VISS-wə-NAH-thən;[1][2] born 20 June 1995)[3] is an Australian actress, comedian, writer and producer.

[7] She also played a recurring role in the Australian series Janet King, and stars in the TBS comedy anthology Miracle Workers (2019–2023).

[11][16] When she was fifteen, Viswanathan and her family spent some time in Los Angeles, California, where she went through the process of securing a manager with the hopes of obtaining Disney and Nickelodeon roles.

The Hollywood Reporter included her in its "Next Gen Talent" list as one of "20 rising stars among the blockbuster breakouts and small-screen discoveries who are shaking up the industry".

[19][20] In 2019, Viswanathan played Rachel in the film Bad Education, which is based on a true story of an embezzlement scandal.

[17] In October 2021, she was cast in the psychological thriller film Cat Person, based on the short story by Kristen Roupenian published in 2017 in The New Yorker.

[23] In January 2024, Viswanathan was cast in the Marvel Cinematic Universe film Thunderbolts*, assuming the role previously held by Ayo Edebiri.