"I think Dhanush is one of the most charming, likable and screen friendly hero I have seen in a long time! He is what he is and that makes it cool," Farah tweeted.
'Raanjhanaa' has been directed by Anand L Rai and also stars Sonam Kapoor. Abhay Deol will make a special appearance in the romantic film.
The film will hit theatres on June 21.