In an unusual pairing, versatile actor Rajkummar Rao has been cast opposite Bollywood's 'dreamgirl', Hema Malini in Ramesh Sippy's next.

The actor is extremely excited to romance the yesteryear actress on screen. "It's a very unusual film. It's a rom-com and the treatment of the film is going to be very different. I am extremely excited to romance Hema Malini on screen," Rao said.

Titled 'Shimla Mirchi', the film is a romantic comedy and if reports are to believed, the plot revolves around a single mother and her daughter who fall in love with the same man.

The makers of the film have also asked Rao to gain weight for this role. "The film will be widely shot in Shimla and I have been asked to gain weight by the makers of the film. I am working very hard to gain weight as I had lost seven kgs for 'Citylights'. I have a personal trainer who is working with me to help me gain weight," he added.

'Shimla Mirchi' is slated to go on floors in mid september.