Jessica Simpson says if her baby is overly large when she is ready to give birth she wants everyone to "pray" for her.

The 31-year-old mother-to-be is expecting a baby girl in the coming weeks but has drawn lots of attention for the size of her bump.

She told People magazine that if her daughter, rumoured to be called Maxwell, is extra large then she may need some divine intervention.

"If we have a 10 pounder, pray for me!" Jessica laughed. "It's so much baby and so much amniotic fluid, it's crazy."

But all joking aside, the Fashion Star mentor is feeling very uncomfortable at the moment and will be happy when her pregnancy is over.

"At this point, I'm really ready," she told the publication. "I'm not sleeping very well; she moves all the time. I had a great pregnancy but I'm ready for it to be over!"

Jessica told Jimmy Kimmel last night that she is now winding up all of her promotional duties and is going to put her feet up until her first child with fianc Eric Johnson arrives.