Naomi Watts is pregnant with her first child by boyfriend Liev Schreiber.

Rumours of the pregnancy were sparked when the actress attended Sunday night's Academy Awards ceremony with her friend, Nicole Kidman, in a flowing Escada yellow gown.

The following night Schreiber confirmed that it was true on 'Late Night with Conan O'Brien'.

"I'm going to be a dad," he said. "It's very exciting."

The couple met while working on romantic drama, 'The Painted Veil', in China in 2005.

Watts was recently seen on Irish screens in Peter Jackson's 'King Kong' and Schreiber has appeared in several episodes of 'CSI: Crime Scene Investigation'.