Already available in Australia, South Africa, Benelux and the Middle East, viewers will be able to view popular BBC dramas within 24-hours of their original transmission.
BBC First is replacing BBC Entertainment and BBC On Demand.
Kelvin Yau, GM of BBC Worldwide Greater China, said: “We are thrilled to bring BBC First to Hong Kong. We are committed to sharing the most fascinating dramas and Hong Kong viewers have always appreciated the intelligent and distinctive content of BBC programmes. BBC First is the ideal platform for us to showcase the best and latest BBC dramas to discerning viewers in Hong Kong, anytime they like.”
Included at launch is Doctor Who spin-off Class, fashion drama The Collection and thriller Undercover.
BBC Earth, BBC Lifestyle, CBeebies as well as BBC World News are also available on Now TV.
In Asia, BBC First is available in Singapore and Malaysia, and as a block in Japan.