Nessun Dorma is a 2016 Hong Kong psychological thriller film directed by Herman Yau and starring Gordon Lam, Andy Hui and Janice Man.

Nessun Dorma had its world premiere at the 40th Hong Kong International Film Festival on 22 March 2016[1] and was theatrically released in Hong Kong on 27 October.

[citation needed] Due to the complexity of her role in the film, Janice Man reportedly suffered from insomnia for a few weeks during production of the film.

[3] A new Category IIB-rated version of the film was theatrical released in Hong Kong on 27 October.

[4] Elizabeth Kerr of The Hollywood Reporter calls the film a "pulpy, unchallenged slice of genre entertainment", stating how "viewers will enjoy for what it is and forget quickly", while also praising Gordon Lam's performance.