Sibi then started his acting career with the 2003 film "Student Number 1", which was a box office failure. In his next four films, "Jore" (2004), "Mannin Maindhan" (2005), "Vetrivel Sakthivel" (2005) and "Kovai Brothers" (2006), he acted with his father, Sathyaraj, who also produced Sibi's following project, "Lee" (2007), directed by Prabhu Solomon, where he played the role of a football player. In his early years, several films he was announced to be part of, such as "Perumal Swamy", "Pattasu" and "Mamu" were shelved midway.