Kangna Ranaut is relying on martial arts to make sure she does not gain even miniscule weight in order to fit into her skin-tight costume for her next film based on a superhero. She is also closely watching her diet to make sure nothing goes wrong.

It is learnt that for her character as the mutant in the film, Kangna has to also train in martial arts for her action sequences. “She is learning some techniques of karate, judo and taekwondo,” says our source. Interestingly, Kangna had to lose about five kilos for her part to fit into her costume.u00a0