Five Star Krishna

Krishna, who had previously apprenticed under Rajiv Menon as an assistant director,^[1] was signed on by Susi Ganesan to appear in a leading role in Five Star, produced by Mani Ratnam.^[2][3] Portraying a runaway husband, he won rave reviews with The Hindu's critic noting "there are scenes where he could have underplayed his emotions a little — but surely the young man has talent".^[4] After winning good reviews for his performance in Five Star, Krishna followed it up playing supporting roles in films including Cheran's Autograph and as a student leader in Mani Ratnam's Aaytha Ezhuthu, while also appearing as Dhanush's brother in the romantic comedy, Thiruda Thirudi. He has since then notably appeared in projects directed by Vishnuvardhan, featuring in four consecutive ventures.

He has balanced appearances in films alongside his advertisement production house. Krishna has directed commercial advertisements featuring Kamal Haasan.^[5], Dhanush, Trisha, Prakash Raj, Nayanthara, Anirudh, Urvashi, Jyothika, Vijay Sethupathi, Samantha, Allu Arjun, Ali, Ilayaraja, Naga Chaitanya, Mohan Lal, Karthi and Rashmika.

In 2023, Krishna directed an episode "Kaadhal Enbadhu Kannula Heart Irukkura Emoji (transl. Love is a Heart-eyed emoji)" in Tamil-language romantic anthology television series Modern Love Chennai https://w.wiki/QfdR .

In 2025, Krishna directed a breezy romantic drama Oho Enthan Baby which released in theatres on 11 July 2025. The post-theatrical streaming rights have been acquired by Netflix. https://w.wiki/QfdW

Krishna is currently directing a biopic titled GDN based on legendary Gopalswamy Doraiswamy Naidu with R Madhavan playing the title role. https://indianexpress.com/article/entertainment/tamil/r-madhavans-gd-naidu-biopic-titled-gdn-krishnakumar-ramakumar-to-helm-the-project-9842466/