India, Dec. 6 -- Actor Vinay Rai, who was last seen playing a negative role in Mysskin's Thupparivaalan, has been signed to play the antagonist in Sivakarthikeyan's upcoming Tamil film, Doctor. Vinay was the first choice for the role and that he was signed even before Sivakarthikeyan came on board.

The project marks the maiden collaboration of Nelson of Kolamavu Kokila fame with Sivakarthikeyan. Tipped to be an action comedy, the film marks the Tamil debut of Priyanka Mohan. In a recent interview, Nelson said the film is an action comedy. While one half of the film will take place in Chennai, the other half will be set in Goa.

He revealed that the film has been titled Doctor because it has elements that are related to doctors. Siva will...