Actress Nayanthara took the entire unit of her upcoming Tamil drama "Dora" by surprise when she finished dubbing for her portion in a single day. The film's director Doss Ramaswamy is amazed by her commitment, says a source."It usually takes a couple of days or even more to dub for a leading character. However, Nayanthara finished dubbing for her portion in just a day, much to the surprise of the entire team. She could have taken more time but she didn't. Her commitment amazed our director," a source from the film's unit told IANS.In the film, she plays the central character. A car plays an equally pivotal role.Also starring Thambi Ramaiah and Harish Uthaman, the film is jointly bankrolled by Hitesh Jhabak and A. Sarkunam.The makers are planning to release the film early next year.