Bipasha Basu is all gaga about her new co-star Rana Daggubati in her upcoming film 'Dum Maaro Dum'. The lady shared the first look of her with the actor in the film on Twitter and said,  http://twitpic.com/4a176c - First look of me n @RanaDaggubati in Dum maaro Dum fr u all!He is a super costar!  Rana is a south Indian Telugu film actor who will be making his powerful Bollywood debut with Rohan Sippy's 'Dum Maaro Dum' starring Rohan's best friend Abhishek Bachchan in the main lead. Bips has also been teaching Rana Hindi language on the sets of the film despite herself speaking an accented version of Hindi. Bips tried her best to help Rana. Dum Maaro Dum is releasing on April 22. The title song of the film that features Deepika Padukone has already become quite a rage and people do have high expectations from this film.