Kollywood actor Arulnidhi is all set to rock in his next flick 'Udhayan'. The actor will don the role of a city groomed boy in the flick.Udhayan is directed by Chaplin. Arulnidhi has signed for his third flick 'Mouna Guru' which will be directed by Shantha Kumar. The shooting of the flick will start in March 18 according to sources.