Kourtney is not rushing the weight loss.

Two new celebrity Moms are talking about the weight they gained while pregnant.

Kourtney Kardashian has revealed that she gained 45 pounds while pregnant with her second child, the reality TV star gave birth to daughter Penelope Scotland last month and tells Us Weekly she is not sweating the post-baby body slimdown just yet

Jessica Simpson earlier said she gained 70 pounds while pregnant with her first baby and will reveal her weight loss through Weight Watchers.

Jessica gave birth to her daughter Maxwell Drew Johnson on May 1 and the singer signed a $4 million deal with Weight Watchers to become their spokesperson as she battles to get her weight back down.

An earlier report revealed the star has now shed enough of the baby fat to film her first TV commercial for the weight loss brand.

She tweeted: "That's a wrap! Just finished shooting my first @WeightWatchers commercial! Stay tuned..."

A source says she wants to be a role model.

"Jess knows how hard it is to get rid of baby weight or any weight really, and she wants to show people that it can be done in a healthy way that isn't a crash diet or crazy workout but it just healthy and fun."

(Image: WENN)