Actress Jessica Simpson lost 50 pounds and says she is "proud" of her figure.

Simpson, who lost weight before marrying Eric Johnson in Montecito, California earlier this month, took to photo-sharing site Instagram to show off her slender physique and credited her time in the gym for boosting her body confidence, reports contactmusic.com.

The 33-year-old, who has a son, Ace, 13 months, and daughter Maxwell, two, with her husband, posted a shot of herself and a friend wearing revealing swimsuits and heels on the picture sharing site as she celebrated her sister, Ashlee's Hawaiian themed bachelorette party.

She captioned the image: "Oh yea girl...We are proud to be in our bathing suits!! @baylormcg #hardworkpaysoff #workoutpartnersforlife."

Although she is more than happy to show off her toned body, Simpson is said to be planning to lose even more weight after becoming "an exercise addict".