Actor Vivek Oberoi has joined the Ranbir Kapoor-starrer film 'Ramayana', according to a report. Vivek may feature as 'Vidyutjihva', the husband of 'Surpanakha', which will be played by actress Rakul Preet Singh. The project is currently under production with Ranbir and actor Yash already having started the shooting, while some of the cast are yet to be finalised.