Jessica Simpson is reportedly pregnant with her second child.

The singer and reality TV star and her partner Eric Johnson are expected to welcome the latest addition to their family in the New Year, according to Us Weekly.

A source told the magazine: "It definitely wasn't planned. But yes, Jessica is pregnant again. She really is overjoyed!"

A representative for Simpson did not comment on the report.

Simpson and her fiance Johnson welcomed their first child, daughter Maxwell Drew Johnson, seven months ago.