Jessica Simpson is reportedly concerned about excessive pregnancy weight gain and has hired a private chef to help her out.

The 31-year-old is expecting her first baby with fianc Eric Johnson and has apparently been enjoying "eating for two."

But she apparently doesn't want to go overboard with the weight gain, having already put on 30lbs, so is seeking nutritional advice.

"Jessica has been indulging in salty foods like chips and extra guacamole," an insider told In Touch. "At this rate she could wind up gaining 70lbs before she gives birth."

But Jessica is making big changes now by hiring a chef as she does not want to go too far over the recommended weight gain.

Infertility specialist Dr. Alison Peck, who does not treat the reality star turned fashion mogul, advises that someone of Jessica's height should safely gain 25-35 pound throughout her entire pregnancy.

"Jessica hired [a chef] to help her cut calories and make sure she's eating the right foods," the insider added.