Jessica Simpson reveals 45 kg weight loss after welcoming third child

Just six months after giving birth to her third child, Jessica Simpson has revealed her staggering weight loss on social media.

The singer and fashion designer shared the news on Instagram with her 4.8 million followers on the platform, saying that she was "100 pounds down" [approx. 45.3 kg].

"Yes, I tipped the scales at 240 [approx. 108.8 kg]," she wrote in the caption.

"My first trip away from #BIRDIEMAE and emotional for many reasons, but so proud to feel like myself again," she continued.

"Even when it felt impossible, I chose to work harder."

The 'With You' singer posed in the social media shot with her smiling daughter, who was dressed in an adorable pink-and-white outfit.

Simpson, meanwhile, showed off her 45 kilogram weight loss in a flowing, black gown cinched at the waist with a statement belt.

In March, Simpson gave birth to Birdie Mae, her third child with husband Eric Johnson.

The former football star and Simpson also have son, Ace, six, and daughter Maxwell, seven.

Simpson has been extremely candid about her struggles with pregnancy weight on social media, including swollen feet.

The 39-year-old also posted a shot on social media at the start of the year after she broke a toilet seat during her pregnancy.

"Warning... Don't lean back on the toilet when pregnant," she wrote.