One of the few Tamil actors who has given nothing but super hit Tamil films like Oru Kal Oru Kannadi, Idhu Kathirvelan Kadhal, Nannbenda, Gethu and Manithan, in a short career span. He seamlessly enacts romantic scenes and never fails to make the audience giggle with his perfect comic timings. He has also produced several of his movies like Manithan, Idhu Kathirvelan Kadhal and Oru Kal Oru Kannadi, to name a few.

Early life
Udhayanidhi Stalin was born in Chennai to Durga Stalin and former Tamil Nadu Deputy Chief Minister M. K. Stalin. He is the grandson of former Chief Minister M. Karunanidhi. He pursued his education at Loyola College in Chennai.

Personal life
The actor got married to Kiruthiga Udhayanidhi and has two children.

Movie career
As an Actor
Udhayanidhi made his acting debut in the industry with a guest appearance in the 2009 movie Aadhavan as a servant. His lead role debut came in 2012 with the Tamil romantic comedy movie Oru Kal Oru Kannadi, under the direction of M. Rajesh. He played the male lead of Saravanan opposite Hansika Motwani, for which he won Filmfare Award for Best Male Debut - South and was nominated at the SIIMA Awards for Best Male Debutant. He once again went on to do a guest role as a flat tenant in the 2013 movie Vanakkam Chennai. Director S. R. Prabhakaran`s family drama Idhu Kathirvelan Kadhal saw him in the male lead Kathirvelan who falls in love with Pavithra, played by Nayanthara, but is hurt when he realizes that she loves someone else. The movie was critically praised for its simple love story along with the right amount of comedy and emotions.

In 2015, Udhayanidhi gave his next hit film Nannbenda, in which he was once again paired opposite Nayanthara, along with Santhanam in a comic role. Even though the movie was a hit, it garnered only average critical reviews who claimed the movie to be predictable, with no new comedy and a weak script. After working in romantic comedies and family drama films, the actor tried his hands at the action thriller genre with Gethu in 2016. Directed by Thirukumaran, the movie saw him play the son of a teacher who sets out on a quest to find out the real culprit behind a murder, which his father is falsely accused for. Gethu had Amy Jackson play the female lead, Sathyaraj in a supporting role, and Vikranth as the antagonist. The movie opened to mixed reviews and was only an average success.

Udhayanidhi was seen in yet another new role of a struggling lawyer Sakthivel in the legal thriller film Manithan. The story revolves around Sakthi who challenges a wealthy man in a hit-and-run case, and wins the case, which establishes him as a successful lawyer. His 2017 release includes the action comedy film Saravanan Irukka Bayamaen, under the direction of Ezhil. Regina Cassandra starred as the female lead in the film, while Srushti Dange and Soori played supporting roles.

As a producer
Udhayanidhi has produced several movies like Kuruvi (2008), Aadhavan (2009), Manmadan Ambu (2010), 7aum Arivu (2011), Oru Kal Oru Kannadi (2012), Idhu Kathirvelan Kadhal (2014), Nannbenda (2015), Gethu (2016), and Manithan (2016). He is also the producer for his 2017 starrer Saravanan Irukka Bayamaen.