Kangana had initially turned down the film as she was concerned about sharing screen space with Priyanka. Earlier, Jacqueline Fernandez, Chitrangada Singh, had similar concerns and they rejected the film.
"A lot of girls rejected that role. It is really stupid to do it as it is an amazing role. I am the heroine of the film, I am playing wife of Hrithik and that is how it is," Priyanka said in an interview here.
Priyanka feels Kangana's role is also quite interesting and if she had the opportunity, she would have even taken it up.
"Her character is credible, it is an amazing role and if I had the opportunity I would have done it. I had told Rakesh sir I am ready to play that part, as everybody was saying no to doing it," Priyanka said.
"I am happy Kangana has done the role, she has done an amazing job. She is looking fabulous and it is a new thing for Hindi cinema," she said.
This is not the first time that Priyanka is sharing screen space with another actress.
"In my first two films I came right after interval and before climax. I have learnt that the film does not run because of the length of your role but because it is a good film. I have done many two-heroine films. For me it doesn't matter, I have always thought of how good I can be in this role, what impact I am leaving in my role," Priyanka said.
"In this film I am the heroine of the film. Her character is also very interesting. In one film there can be various characters... if the film works then it works for me, Hrithik, Vivek and Kangana. If it doesn't work and I am the most important person in the film, then what is the point as eventually the film did not work," she said.
There were reports that all was not well between the two actresses and they were not going to share same platform to promote the film.
However, Priyanka rubbished it saying that when people see them together promoting the film, then they would get to know of such reports not being true.
Priyanka will be playing a dual role in the film, but she insists it's not a double role.
"I am not doing a double role but a dual role. I am playing Krrish's wife Priya Mehra as in the last film we left as being lovers. I go from being a good wife to being evil in the film. It is the duality of good and evil that I play which is very interesting," she said.
"When he (Rakesh Roshan) narrated me the script he was super excited about this thing. I had not decided or thought about this," she said.
Priyanka does not have any specific look in the film like her co-actress Kangana.
"There is Vivek's character that is bad and his army of mutants, they are called 'maanvar' which are a mix of human and animal. There is a chameleon girl played by Kangana, then there is scorpion, cheetah girl, rhino, frog man in it. They are in the army of 'Kaal' (played by Vivek Oberoi) and they are evil. I am normal, I am not part of the mutant space," she explains.
Sci-fi films are primarily about superhero and supervillian but in 'Krrish 3', both Priyanka and Kangana have interesting roles.
"Usually in superhero films girls don't have anything to do, they are just damsels in distress. But in this film, I have duality in the film and even Kangana's character is interesting," Priyanka added.
'Krrish 3' releases on November 1.