Hong Kong comedian Chapman To stayed true to his famously witty and straight-talking self at a press conference on Thursday afternoon to promote his movie, King Of Mahjong.

At the event held at Equarius Hotel at Resorts World Sentosa, he took every opportunity he had to poke fun at his fellow cast members, which include local stars Mark Lee, Patricia Mok, Dennis Chew, and Hong Kong starlets Cheronna Ng and Venus Wong.

He took extra digs at Wong, a 23-year-old model-actress who is rumoured to be dating veteran actor Eric Tsang's son Derick. Tsang himself has a brief cameo in the film, which opens in cinemas on Feb 19.

To, 42, said in a deadpan manner in Mandarin: "Eric Tsang came to the set to film for only two days, but he wanted to show off how great he is, so he would buy us all food. I think it's also because someone in his 'family' was there, so he was being extra generous."

Throughout the press meet, he continually referred to Wong as "someone's daughter-in-law", leaving her laughing and shaking her head in embarrassment.

As for Ng, who sported a healthy tan, To repeatedly labelled her as "a Filipino who speaks great Mandarin".

Asked whether anyone gets offended by his jibes, the media-savvy actor said that he says these things "only because it's the only way journalists will write about them, otherwise you won't even mention that they were here".

In King Of Mahjong, To and Lee play rival mahjong experts. The star-studded film also has cameos from Hong Kong actress Susan Shaw and Taiwanese actress Tien Hsin.