The much anticipated teaser of Chiyaan Vikram's Irumugan will be unveiled tomorrow, as a birthday gift for the actor who is playing as a RAW secret agent in the movie.Directed by Anand Shankar of Arima Nambi fame and it has Nayanthara & Nithya Menen as the lead heroines.Chiyaan will be seen in dual roles which are completely in contrast with each other and the most part of the film has been shot in Malaysia.The team has already completed one half of the movie and the shooting for the second half is going on.