Indian actor Karthik Sivakumar, professionally known as Karthi, is a name that needs no introduction. The actor, who was most recently seen in the Mani Ratnam magnum opus 'Ponniyin Selvan: Part 1', considers the director his mentor and was ready to take up any role in the film - even of a horse - because he didn't want to miss his chance of working with the director, known for films like 'Roja', 'Bombay', 'Guru' and 'Yuva' among several others.