He is known for his role as young Sahir and Samar in Dhoom 3. He played young Mauryan prince Ashoka in Colors TV's Chakravartin Ashoka Samrat, Prince Bindusara in StarPlus's Chandra Nandini and Aladdin in Sony SAB's Aladdin – Naam Toh Suna Hoga.

Siddharth was recently admitted in the hospital because of dengue and he had shared a photo from the hospital on January 22 in which he was seen lying on the bed with drips in his hand.