Among those who congratulated Zaira on Twitter was actor Anupam Kher, who, like Zaira, is Kashmiri:
Zaira Wasim made headlines months ago after she was trolled, allegedly for meeting Jammu and Kashmir chief minister Mehbooba Mufti. She posted a long Facebook note apologizing for giving offence, later deleting it. She received plenty of support on social media, including a tweet from Aamir Khan who described her as his "role model."
Aamir has cast Zaira as the lead in Secret Superstar, which he will produce and also make a special appearance in.
Zaira Wasim's win was Dangal's sole National Award - Aamir Khan's failure to win Best Actor has been questioned on Twitter, which is also debating the merit of Akshay Kumar's performance in Rustom being awarded over Aamir's.
Dangal, which released last December to five star reviews, stars Aamir Khan as wrestler Mahavir Phogat. Zaira and actress Fatima Sana Shaikh played the younger and older versions of Mr Phogat's daughter Geeta, a wrestler like him. The film displaced PK, also starring Aamir, as Bollywood's biggest hit.