"Hello" features exceptional performances from its cast. Akhil Akkineni brings Seenu/Avinash to life with his charming and enjoyable portrayal. Kalyani Priyadarshan, in her debut role, impresses with her class and grace as Junnu/Priya. Additionally, Ramya Krishnan and Jagapathi Babu play pivotal roles, adding depth and emotion to the narrative. Their characters are essential to understanding the transformation of the protagonist, Avinash.