Uma Thurman expecting a baby?

Rex Features

Uma Thurman has been photographed with a protruding stomach, prompting speculation that she is pregnant.

The Kill Bill star wore a tight dress which appeared to reveal a suspicious bump while co-hosting the annual Nobel Concert in Norway with Kevin Spacey.

She has been dating Swiss millionaire Arpad Busson, supermodel Elle Macpherson's former husband, since July. The pair were rumoured to be engaged in October, but Thurman's publicist denied the claims.

The actress has two children with ex-husband Ethan Hawke, whom she divorced in 2004.