Kangna, 28, won her second national award for the Vikas Bahl-directed film.
"It's been long-long journey with Priyanka and it began during 'Fashion' when I was a starry-eyed fan of hers. She was a superstar during that time and today I am competing with her. It feels great.
"We have always maintained our friendship since 2008. She had no reason to choose me as her friend because I was a nobody at that time. She called me from California and congratulated me after the awards were announced. We spoke for an hour," Kangna told PTI.
Post Kangna's win, Priyanka had congratulated her "Fashion" co-star and had tweeted, "I hate losing. But if I had to take a back seat to anyone this year it would be you #KangnaRanaut ! Congratulations!yay Queen!#SmallTownGirls."
Kangna said she has highest regard for the former Miss World and her work.
"I have been misquoted many times when it comes to Priyanka. But it hasn't changed our equation. Art is subjective and if people say that her performance in 'Mary Kom' was better than I have no issues with that. It's just the spirit which matters," she said.