King Kong star Naomi Watts is expecting her first baby, according to media reports in Australia.

The actress was in Sydney, Australia, last weekend (24 June) attending best pal Nicole Kidman's wedding to country star Keith Urban.

Rumours circulated after the stylish star was seen wearing a series of baggy garments and photographed leaving a Brentwood, California, fertility clinic.

Sydney's Daily Telegraph newspaper reports it was the second time Watts had been spotted visiting the clinic and that she was "sporting a definite glow" when she attended the Shakespeare in the Park gala in New York City's Central Park with beau Liev Schreiber on June 29.

Watts was also seen visiting Chinese herbalist and fertility expert Lily Liu in Australia, who is renowned for her work assisting women who want to become pregnant.

The star recently admitted she was desperate for children, but was worried it might be too late to conceive: "I wish it could have happened a little bit sooner. I have wanted a family since I was 19."