The film was a moderate success in Tamil but the dubbed version in Telugu gave Siddharth an opening in the Telugu film industry. Shankar for casting in his then upcoming film Boys, in which he eventually made his acting debut. Writer Sujatha Rangarajan recommended his name to S. CareerAfter his MBA, Siddharth landed the role of assistant director for Mani Ratnam's Kannathil Muthamittal. The couple are said to have one son-Shaurya S.Narayanan.The couple grew up together in New Delhi.

In 2006, he divorced his wife of four years, Meghna. He is also said to have taken French in high school.In all in interviews he comes out as a down to earth, highly intellectual and well read but aloof individual. He went on to complete his MBA in 2001 from S P Jain Institute of Management and Research, Mumbai.He is fluent in English, Hindi- having lived in Delhi for many years,his mother tongue - Tamil, Telugu-which he learned for his movies and he has also stated that he used to watch Malayalam movies as a child and can understand the language to an extent. He was also president of the college's debating society and attended the World Debating Championships. Siddharth was popularly known as 'Sidy' in school and college, and was part of the reputed theatre group of the college The Players. He got his Bachelor of Commerce (Honors) degree from Kirori Mal College, New Delhi.

Personal lifeSiddharth was born in Chennai, Tamil Nadu to a Tamil Iyer family.His family hails from Thanjavur.He studied at DAV Boys' Senior Secondary School, Chennai and Sardar Patel Vidyalaya, Delhi.

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