Chennai, Oct 18 (IANS): Superstar Rajinikanth has dubbed for his upcoming Tamil film "Lingaa" at a lightning speed. He is said to have finished dubbing for it in less than 24 hours, much to the surprise of the film's crew.

"Rajini sir recently completed dubbing for the film in less than 24 hours. Usually, dubbing takes a few days for most actors as it requires going over few lines in sync with the scenes. But Rajini sir finished dubbing most of his lines in one take," a source from the film's unit told IANS.

"Lingaa", which is currently in post-production, is completed, but for two songs.

"The introductory song and a duet are yet to be canned. Rest of the shooting has been completed. For one of the songs, the team plans to go to Europe," he said.

The duet will feature Sonakshi Sinha and Rajinikanth.

Directed by K.S. Ravi Kumar, the film is likely to release on superstar's birthday Dec 12. Actress Anushka Shetty plays the second heroine in the film.