Jessica Simpson has revealed that her partying lifestyle has grinded to a halt since becoming pregnant.

The 31-year-old is expecting her first baby with fianc Eric Johnson in the next few weeks and says that her routine has already changed.

Speaking to Life & Style, Jessica says that she is now getting all the sleep she can before her baby arrives as she'll then be tied to nightly feeds and changes.

"I sleep like a rock!" Jessica shared of her nocturnal habits. "Nothing wakes me."

"We're in bed now by like 8pm. No more wild nights for us."

Jessica also revealed that she's had a smooth sailing pregnancy so far and hasn't had to deal with any uncomfortable issues.

"I'm actually very lucky," she revealed. "I haven't had [any morning sickness]. I'm just really excited to meet the baby.

But the engaged pair are already at odds as to what career they want their child to have.

"Jess wants a designer, and I want an athlete," Eric said from a biased perspective being a former NFL player.

"We'd like a good combination of that too though. No matter what, we're just really excited to meet the baby, our child. [Expecting a baby] is new to the both of us, so it's just an amazing feeling."