He made his debut in Gandhi Krishna's romantic musical Ananda Thandavam (2009), also playing a supporting role alongside Vijay Antony in Naan (2012).
After a six-hour audition, he was selected to play the lead role in the director's romantic musical Ananda Thandavam, a film adaptation of the Sujatha serialized novel Pirivom Santhippom.
[4] Rediff.com felt that Siddharth's performance was one of the weaker aspects of the film noting "though he does his best when he's romancing his beloved, and there are sparks during emotional scenes, he seems to miss his cue a few times, making you wonder if someone with acting chops might not have done a better job.
[6] The film restarted with Vijay Antony's interception as producer in 2010, while the music director making his debut as an actor also took the lead role from Siddharth.
The film was shot over two years, with Siddharth playing a supporting role, amongst an ensemble cast also including actresses Rupa Manjari, Anuya Bhagwat and Vibha Natarajan.