Gillian Chung (born January 21, 1981) is a Hong Kong-based actress and singer. She is best known as a member of the Cantopop girl group Twins, alongside Charlene Choi. In 2000, one of the model agencies that Chung worked for as part-time while in HK contacted Chung about a job opportunity offered by Emperor Entertainment Group (EEG). Chung accepted the offer in 2000 and became a contracted artist of EEG and started to undergo trainnings before debut. In 2001, the magagement company assigned her to form a singing duo, Twins, with Charlene Choi, whom she is not actually related, in 2001.

Chung made her film debut in U Man which was released in 2002 and has since proven her acting skills in a number of films like Beyond Our Ken which has earned her critical acclaim, being nominated as 'Best Actress' in the Gam Zhi Ging Awards. Outdoing herself in every martial arts sequence, Chung has established herself as the up and coming action star.

In the film Beyond Our Ken released in 2004, Chung played as Chan Wai Ching, a spurned girlfriend of the eponymous Ken. The film managed a box office taking of HK$3,886,355 and it has its World Premiere in Tokyo International Film Festival.In January 2006, the film 49 Days exceeded the HK$10 million mark, earning a spot in one of Hong Kong's best box office films for the year 2006[citation needed]. Chung is a graduate of the Kowloon True Light Middle School and attended RMIT University in Melbourne, Australia. She did not finish her studies in RMIT.

The Hong Kong Television and Entertainment Licensing Authority received 2875 complaints regarding the revealing photos and the incident was referred to the Obscene Articles Tribunal for further action. On November 1, 2006, Easy Finder lost its appeal against an obscenity ruling on the published article and pictures. The appeal panel, consisting of one magistrate and four lay members, upheld the judgement, declaring the article "obscene", and saying it was a "calculated act of selling sexuality which is corrupting and revolting".Jimmy Lai, founder of Next Media (Easy Finder's publisher), interviewed on the television show Be My Guest, apologized to Gillian and offered to return all the negatives.