Chennai, Sep 23 (IANS): Actor Vikram is giving his role in upcoming Tamil romantic-thriller "Ai" everything he can. After losing nearly 15 kg for the movie, he has now shaved his head to shoot a crucial portion of the film.

The film has been on floors for over a year now.

Vikram gave his first public appearance with a clean shaven head Saturday here at the centenary fete of Indian cinema.

"He (Vikram) shaved his head recently to shoot some important scenes in the film. He had spent a lot of time undergoing physical change for his role. Audiences are in for lot of surprises from this film as Vikram dons multiple looks in it," a source from the film's unit told IANS.

Vikram had earlier gone bald for Tamil romantic-tragedy "Sethu", which was later remade in Hindi as "Tere Naam".

He has earlier undergone physical variations for Tamil films such as "Anniyan" and "Pithamagan".

"He had never lost so much weight for any of his films. He has undergone unbelievable physical transformation for 'Ai'," the source added.

"Ai" is being directed by Shankar. It also features Amy Jackson, Santhanam, Suresh Gopi, Upen Patel and Ramkumar Ganeshan in important roles. Double Oscar-winning composer A.R. Rahman is composing tunes for the film.