Siddharth Jonnalagadda, credited and popularly known as Siddhu Jonnalagadda is an Indian actor and screenwriter known for his works predominantly in Telugu cinema. He made his debut with Josh (2009) and in Tamil with Vallinam (2014). Jonnalagadda later went on to co-write and appear in films such as Guntur Talkies (2016) and Krishna and His Leela (2020), whereas DJ Tillu (2022) and Tillu Square (2024) established him as one of the popular new-age actors of Telugu cinema.