BEIJING - Pregnancy rumours are again swirling around Chinese actress Zhang Ziyi, who has an upcoming movie about, well, a baby.

A source close to her family said her parents were elated with her pregnancy and she is due in December, said a report in Chengdu's Huaxi Metropolitan Daily carried by Beijing's NetEase website on Monday.

Similar reports came out earlier in publications and the I Am Paparazzi website showed a photo of Zhang at a spa with a protuding belly.

There has been no confirmation from the spokesmen for the actress or her rocker fiance Wang Feng, but reports last month said she looked tired while attending a press conference for John Woo's The Crossing II, in which she stars.

She looked slim in photos and wore high heels, but reports said her dress appeared to cover a little bump.

It did not help that earlier this month, she posed as a pregnant lady using a fake baby bump while promoting Oh My God, a movie she is producing about two couples with a baby "delivered from the heavens", according to a poster.

Also starring K-pop's EXO member Lay, the film opens in China on Dec 4. Zhang, 36, joked that "her baby's" expected arrival date is Dec 4.