Actor Isha Koppikar, who is returning to Tamil cinema after two decades, will be seen playing an assassin in Sivakarthikeyan’s science-fiction film Ayalaan. Isha was last seen in Tamil film Narasimha (2001) in which she was paired with Vijayakanth. In Ayalaan, she will be seen playing the antagonist.Talking about bagging the project, Isha told Times of India: “It’s a femme fatale role, something that I’ve always been waiting for. It is full of action, and I love the Lara Croft kind of roles. I think I have that kind of a strong image and this role falls completely in my scheme of things. I always believe that there cannot be an effective protagonist without a strong antagonist. In this, Sivakarthikeyan is the protagonist and I am the antagonist. For me, it is a fantastic opportunity; especially an actress gets to play such a role opposite such a huge star.”It has already been confirmed that the film will have music by double Oscar-winning composer A.R Rahman, who has even agreed to croon the opening song of the album. Sivakarthikeyan revealed that he has decided to forego his remuneration for the project. He also confirmed that he will reunite for Ravi Kumar for another project to make up for the time lost on this project. Last seen on screen in superhero film Hero which bombed at the box-office, Sivakarthikeyan also has Tamil comedy Doctor in his kitty.