As a child, he had no desire to become an actor like his father, but while studying global corporate strategy at the University of Westminster he began attending evening drama classes at the Tony Grecos Acting Studio.
He then moved back to Hong Kong, where he again waited on tables before landing a number of prominent modelling jobs, featuring in advertisements for Motorola and Sony MiniDisc.
In 2010, Ng was cast in the lead role of a biographical film based on the life of Cheng Guorong, aka "Brother Sharp", a Chinese man who became a minor celebrity while living homeless on the streets of Ningbo after pictures of him were posted online.
While working in London he took part in a production of Elegies for Angels, Punks and Raging Queens, the proceeds from which were given to a local AIDS centre.
As of 2006, Ng was doing volunteer work at events with the Society for AIDS Care in Hong Kong, as well as a teen support group that deals with topics such as safe sex.