President Pranab Mukherjee honoured the actress on Sunday at the 62nd National Film Awards ceremony here.
This is her second award with the first one being in the Best Supporting Actress category for "Fashion".
"That was supporting actress and this is Best Actress. 'Queen' has also got another award. So, we will have a big celebration party in Mumbai," she told reporters.
Dressed in a body-hugging gown in pastel shade with a long flowing cape, the actress looked chic as she completed her look with a bun and a dark lip colour.
The film which narrates a story of an inspirational girl-next-door who embarks on her honeymoon alone after her prospective husband backs off, also won the honour in Best Hindi film category.
Kangana portrays role of a simple girl named Rani. She was appreciated for the role from all quarters.
"I never expected 'Queen' to get recognition at this level (winning a National Film Award). We are very happy that the film was accepted on such a wide scale," she said.
Actress Tripta Lakhanpal, who played role of Kangana's grandmother in the film, was also present to cheer for the actress at the award ceremony.
Produced by Phantom Films and Viacom 18 Motion Pictures, the film which was directed by Vikas Bahl also starred Rajkummar Rao and Lisa Haydon.
Kangana is now busy with her upcoming films "Tanu Weds Manu Returns" and "Katti Batti". She has also bagged a biopic on late Indian screen icon Meena Kumari.
