Expert), alternatively spelled as Valaavaan,[1][a] is a 2006 Indian Tamil-language romance film written and directed by Silambarasan, starring himself in the lead role alongside Nayanthara and Reema Sen whilst Sandhya, Santhanam, Premji and Sathyan play supporting roles.

The music was scored by noted musician and Silambarasan's friend, Yuvan Shankar Raja, coming together again after churning out the successful album of Manmadhan (2004).

Yuvan Shankar Raja won accolades for his soundtrack, whereas especially the songs "Loosu Penne" and "Yammaadi Aathaadi" were both popular.

The film was released on 21 October, during Diwali Festival time, alongside Varalaru, Vattaram, Thalaimagan and Dharmapuri.

[5] The Times of India wrote: "Reema Sen's performance as a psychotic maniac created chills in the hearts of the audience.

Watching the sudden transformation of a happy school going Reema Sen into a lunatic out for vengeance was eerily brilliant!

[6] The Hindu wrote: "Vallavan's basic sketch is simpler than Manmadhan, though the maker has lent it his trademark frills".

[8] Behindwoods.com commented: "On a positive note, the glamorous quotient of two heroines along with music and the youth element can play to Vallavan's advantage".

[citation needed] The poster featuring Silambarasan biting Nayanthara's lips was objected by women's organisations.

[13] During the making, Reema Sen threatened legal action against Silambarasan after he made changes to the scope of her role in the film.