A spokesperson for Mila Kunis has denied ongoing reports that the actress is pregnant.

The Black Beauty actress sparked speculation that she was expecting after she was photographed with what appeared to be a slightly rounder stomach while out in Los Angeles with rumoured boyfriend Ashton Kutcher on Saturday.

However, a representative for the 29-year-old star has set the record straight by telling the Daily Mail website that “she is not expecting".

Former That '70s Show co-stars Kunis and Kutcher are said to have begun dating earlier this year but they have not commented on the romance reports.