Actress Jessica Simpson attends the launch of the Blockbuster Total Access program in Hollywood, California November 2, 2006. REUTERS/Mario Anzuoni (UNITED STATES)

Jessica Simpson is “excited” to show off the progress of her weight loss.

The new mother gave birth to her daughter Maxwell Drew Johnson on May 1 and has been working out at the gym to get rid of the 70 pounds she gained during her pregnancy.

A source close to the 30-year-old blonde beauty told website RadarOnline: “Jessica is so excited to show off her hard work. She's finally dropping some weight and she's so happy to be getting back into shape.”

The singer signed a $4million deal with Weight Watchers to become their spokesperson and she has been following their weight loss plan religiously.

The 'Dukes of Hazard' actress got her family and friends to lose weight with her and is exercising with celebrity trainer Harley Pasternak.

The star has now shed enough fat to film her first television advert for the brand.

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

Jessica, is loving being a parent with her fiance Eric Johnson, and according to the source is hoping she will be an inspiration to other women.

They said: “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.” - BANG Showbiz